The Ministry of the Mouth

This is the manuscript of the  the fourth sermon in the "Watch Your Mouth" series.

Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear. (Ephesians 4:29 ESV)

There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing. (Proverbs 12:18 ESV)

We will look at the profound impact, spiritual responsibility, and legacy of our words. Moving from understanding the raw power of speech to practicing its stewardship, this message challenges believers to evaluate whether their everyday communication is building up or leaving lasting scars.

Rather than treating speech as a matter of simple etiquette, the sermon emphasizes implementing a "holy fast" or a tight scriptural rein to stop the flow of destructive patterns like gossip, criticism, grumbling, and lying.

To operate in a true ministry of the mouth, individuals are called to intentionally shift the balance away from constant correction toward biblical affirmation, validation, and encouragement. The message introduces a constructive speech filter, prompting us to ask if our words are wholesome, timely, and necessary to meet the specific needs of the listener. Ultimately, the sermon teaches the deep spiritual anatomy of silence—demonstrating that choosing to hold one's tongue and wait on God is often the ultimate expression of trust in His sovereignty.

Scripture

Ephesians 4:17-30 ESV  [17] Now this I say and testify in the Lord, that you must no longer walk as the Gentiles do, in the futility of their minds. [18] They are darkened in their understanding, alienated from the life of God because of the ignorance that is in them, due to their hardness of heart. [19] They have become callous and have given themselves up to sensuality, greedy to practice every kind of impurity. [20] But that is not the way you learned Christ!— [21] assuming that you have heard about him and were taught in him, as the truth is in Jesus, [22] to put off your old self, which belongs to your former manner of life and is corrupt through deceitful desires, [23] and to be renewed in the spirit of your minds, [24] and to put on the new self, created after the likeness of God in true righteousness and holiness. [25] Therefore, having put away falsehood, let each one of you speak the truth with his neighbor, for we are members one of another. [26] Be angry and do not sin; do not let the sun go down on your anger, [27] and give no opportunity to the devil. [28] Let the thief no longer steal, but rather let him labor, doing honest work with his own hands, so that he may have something to share with anyone in need. [29] Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear. [30] And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption. 

Introduction: The Purpose of the Instrument

It is a blessing to be back together today for week four of our series, "Watch Your Mouth," as we dig into the life-altering, biblical wisdom in this series of sermons. 

Over the first three weeks we have treated our speech with the seriousness it deserves. We looked at the explosive power behind our teeth. We discovered that our mouth is just a loudspeaker for our heart. And last week, we learned how to change the dial off the channel of fleshly defeat and onto the channel of covenant victory.

When we use our words with integrity to actively speak life, advocate for equity, and voice appreciation, we are making conscious "spiritual deposits" that break chains of discouragement and build up the people around us.

We are going to look at the profound impact of and honoring how God uses willing vessels, regardless of their title, gender, or status, to bring His fathering heart, His structure, and His identity to a broken world. 

If you were to buy a top-of-the-line, precision-engineered medical scalpel, you wouldn't use it to scrape rust off an old car bumper. You wouldn't use it to pry open a can of paint. Why? Because it is a specialized instrument designed for a noble purpose: to heal, to repair what is broken, and to assist in saving a human life.

God did not give you a mouth simply to yell at the television, or vent your frustrations after a long day. He engineered your vocal cords for a much higher, noble purpose. He designed your mouth to be an instrument of covenant ministry, because your words can shape a person’s concept of themselves—and their concept of God the Father—for the rest of their lives.

Let's take a look at our text today, first from the Apostle Paul in the book of Ephesians, and then from the wisdom of Solomon in the book of Proverbs.

Text:

Ephesians 4:29 ESV Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear. 

Proverbs 12:18 ESV [18]  There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.

1. The Quality Control of the Kingdom

Let's look first very closely at Paul's command in Ephesians 4:29. “Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear.”

He starts with a strict, boundary-setting prohibition: "Do not let any unwholesome talk come out of your mouths..."

The Greek word used for "unwholesome" here is sapros. In the ancient marketplace, this word was used to describe rotten fruit, spoiled fish, or decaying wood. It is stuff  that has lost its utility, smells foul, and spreads contamination to anything it touches.

Paul is saying that when a Christian uses their mouth to speak words of malice, harsh sarcasm, tearing criticism, or slander, it is the spiritual equivalent of serving a plate of rotten, foul meat to the people around them. It poisons the environment.

But then notice the filter Paul establishes. He says the standard for what leaves your lips is that it must be 'only what is helpful for building others up according to their needs.

Let’s read that verse again “Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear.”

A couple of weeks ago I gave the folk in Bible Study a filter to use before we speak.  It is the THINK FILTER:

• T – Is it True?

• H – Is it Helpful?

• I – Is it Inspiring (Does it build up)?

• N – Is it Necessary?

• K – Is it Kind? 

If what you are going to say fails even one of these criteria, then don’t say anything. 

Now I realize that this  requires a total shift in our perspective. 

Most of the time, when we speak, we are thinking about our needs—our need to be right, our need to express our anger, our need to vent. But the Kingdom standard for speech is driven by the needs of the listener, not the speaker. 

Before you speak to your friend, your child, your coworker, or your brother and sister in Christ, you need to run your words through this filter.    Is it true, is it helpful, is it inspiring, is it necessary, is it kind.  

2. Words as Spiritual Medicine

In the second half of our text Solomon contrasts two types of speakers:  Look at the second scripture in our text today;

Proverbs 12:18 ESV [18]  There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.

Think about that imagery. Reckless words are like a sword wielded by a blindfolded man. Every time they swing their mouths, they are cutting people open. They’re slashing at their confidence, piercing their joy, and stabbing their friends in the back. Even if they try  to laugh it off and say, "Oh, I didn't mean anything by it, I was just telling the truth, in love" the damage is done. The bleeding is real.

But then Solomon shows us the alternative: "the tongue of the wise brings healing."

Your mouth can function as a spiritual pharmacy. When you cultivate a wise, Spirit-led tongue, your words carry active, therapeutic ingredients.

• A word of sincere validation can act as an ointment on a wound of rejection.

Proverbs 16:24 ESV[24]  Gracious words are like a honeycomb, sweetness to the soul and health to the body.

Modern medicine consistently proves that stress, anxiety, and depression—often triggered or worsened by verbal abuse or emotional isolation—have tangible physical consequences on the body. Godly words are therapeutic. When you speak life over someone, you are injecting spiritual medicine that brings psychological and physical relief.

• A word of biblical encouragement can serve as a dose of strength to someone paralyzed by fear.

Proverbs 12:25 ESV[25]  Anxiety in a man’s heart weighs him down, but a good word makes him glad.

• A word of gentle truth can act like a surgeon's scalpel, cutting away a dangerous lie so that healing can begin.

Proverbs 27:6 ESV[6] Faithful are the wounds of a friend; profuse are the kisses of an enemy.

You have the power to alter the emotional and spiritual climate of someone's day just by the words you choose to speak. You are either bleeding people dry with your swords, or you are binding them up with your medicine.

3. Depositing Grace into the Soul

Look again at the final phrase of Ephesians 4:29:

Ephesians 4:29 ESV Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear. 

Ephesians 4:29 NIV translation says “that it may benefit those who listen.” 

The word "benefit" or "grace" here implies a deposit. 

Imagine making a deposit to your bank account.   When you do that qwalking up to a bank teller window or today the ATM. or electronically to make a deposit, you are adding value, leaving that account richer than it was before you acted. 

When you talk with someone you have either left a deposit in their soul or made a withdrawal from it.

Here is what it looks like to intentionally make deposits in the people around us:

• For a Family Member: When you say, "I notice how much heart you put into everything you do for us, and I truly value your integrity," you just made a meaningful deposit.

• For a Friend: When you look at them and say, "I see God’s hand on your life, and I am incredibly proud of the person you are becoming," you just made a huge deposit.

• For a Neighbor: When you tell them, "I appreciate the care and kindness you bring to our community; it truly makes a difference," you just made a lasting deposit.

Every daily interaction gives us the choice to leave someone richer, stronger, and more whole than we found them.

But when we focus only on what's wrong, when we nag, criticize, and belittle, we are constantly making withdrawals until the people around us are spiritually bankrupt, emotionally exhausted, and running on empty.

Conclusion & Invitation: Commissioned to the Ministry of the Mouth

God has called us out of darkness and into His marvelous light. And in doing so, He has commissioned us into ministry. You might not stand behind a pulpit like this one, but you stand in a pulpit every time you sit at the dinner table, every time you send an email, and every time you talk to someone. Your mouth is your microphone for ministry.

Let’s decide today to lay down the swords of recklessness. Let’s stop serving the unwholesome, rotten fruit of complaints and criticism. Instead, let's offer our vocal cords to the Holy Spirit as instruments of healing, grace, and life. Let's make it our daily prayer that anyone who encounters our voice leaves richer, stronger, and closer to Jesus.

Victory in Your Voice

This is the manuscript of the third sermon in the series "Watch Your Mouth".

But Joshua had commanded the army, “Do not give a war cry, do not raise your voices, do not say a word until the day I tell you to shout. Then shout!”  (Joshua 6:10 NIV) 

Every single object in the physical world has what scientists call a "resonant frequency"—a specific rate of vibration. If a singer hits the exact resonant frequency of a wine glass, that glass will shatter from the sheer force of the sound wave. 

In the spiritual realm, your voice has a frequency. When you speak, you are broadcasting on one of two frequencies: the frequency of the flesh (which aligns with defeat, doubt, and despair) or the frequency of faith (which aligns with God’s sovereign promises, victory, and power).

Many of us wonder why we experience a constant stream of defeat in our homes, finances, health, and peace of mind, when the reality is that we use our own mouths to declare that defeat every single day. 

Scripture

Joshua 6:1-10 NIV [1] Now the gates of Jericho were securely barred because of the Israelites. No one went out and no one came in. [2] Then the Lord said to Joshua, “See, I have delivered Jericho into your hands, along with its king and its fighting men. [3] March around the city once with all the armed men. Do this for six days. [4] Have seven priests carry trumpets of rams’ horns in front of the ark. On the seventh day, march around the city seven times, with the priests blowing the trumpets. [5] When you hear them sound a long blast on the trumpets, have the whole army give a loud shout; then the wall of the city will collapse and the army will go up, everyone straight in.” [6] So Joshua son of Nun called the priests and said to them, “Take up the ark of the covenant of the Lord and have seven priests carry trumpets in front of it.” [7] And he ordered the army, “Advance! March around the city, with an armed guard going ahead of the ark of the Lord.” [8] When Joshua had spoken to the people, the seven priests carrying the seven trumpets before the Lord went forward, blowing their trumpets, and the ark of the Lord’s covenant followed them. [9] The armed guard marched ahead of the priests who blew the trumpets, and the rear guard followed the ark. All this time the trumpets were sounding. [10] But Joshua had commanded the army, “Do not give a war cry, do not raise your voices, do not say a word until the day I tell you to shout. Then shout!” 

Introduction: The Frequency of Faith

Today is week three in our series, "Watch Your Mouth”.

Over the last two weeks, we have laid a heavy foundation. In week one, we looked at the explosive power behind our teeth—realizing there is dynamite that can either clear a path for the Kingdom or blow up our lives. Last week, we dug beneath the surface to realize that our mouth is simply a loudspeaker for our heart. If we want to change the song coming out of the speakers, we have to let the Holy Spirit change the station playing in the heart.

Today, we are taking a massive ground-shifting step. We are going to look at how our words actually shape our spiritual environment.

Every single object in the physical world has what scientists call a "resonant frequency"—a specific rate of vibration. If a singer hits the exact resonant frequency of a wine glass, that glass will shatter from the sheer force of the sound wave. 

In the spiritual realm, your voice has a frequency. When you speak, you are broadcasting on one of two frequencies: the frequency of the flesh (which aligns with defeat, doubt, and despair) or the frequency of faith (which aligns with God’s sovereign promises, victory, and power).

Many of us are wondering why we are experiencing a constant stream of defeat in our homes, our finances, our health, and our peace of mind, when the reality is that we are using our own mouths to declare that defeat every single day. 

Scripture shows us how God connects our voice to our victory. 

Following the death of Moses, Joshua was appointed by God to lead the nation of Israel into Canaan—the Promised Land. Jericho was the very first major city standing in their path. Geographically, it was a vital strategic stronghold. If Israel could capture Jericho, they would successfully split the land of Canaan right down the middle, preventing the northern and southern kings from uniting against them. 

Jericho was famous for being a heavily fortified city-state. Think of ancient Middle Eastern fortresses like a layered defense: first, a giant dirt slope to slow you down, then a heavy stone retaining wall, and finally, towering brick walls capping the whole thing off."

Picture God’s people standing before the formidable fortress of Jericho. Its massive stone walls loomed large, and by any human standard, victory was an absolute impossibility. It was then that God handed Joshua a battle strategy that defied all conventional military logic.  The strategy was to;

March around the city once a day for six days, and then seven times on the seventh day.

The strategy is laid out clearly in

Joshua 6:2-5 (NIV) Then the Lord said to Joshua, 'See, I have delivered Jericho into your hands, along with its king and its fighting men. March around the city once with all the armed men. Do this for six days. Have seven priests carry trumpets of rams’ horns in front of the ark. On the seventh day, march around the city seven times, with the priests blowing the trumpets. When you hear them sound a long blast on the trumpets, have the whole army give a loud shout; then the wall of the city will collapse and the army will go up, everyone straight in.'"

Woven directly into this unorthodox battle plan was a strict, highly specific command regarding their speech: "Do not say a word until the day I tell you to shout."

Here’s our text for today 

Joshua 6:10 NIV But Joshua had commanded the army, “Do not give a war cry, do not raise your voices, do not say a word until the day I tell you to shout. Then shout!” 

God gave Joshua a highly unconventional military strategy to conquer the fortified city of Jericho:

The Israelite army, along with priests carrying the Ark of the Covenant, had to march around the city walls once a day for six days, and seven times on the seventh day.

For the first six days, total silence was required from the soldiers. No battle cries, no chatter, no whispering.

Only on the seventh day, after the seventh lap, when the trumpets sounded a long blast, were they finally commanded to shout—at which point the walls of Jericho collapsed.

Why did God demand total, absolute silence from an army of over 600,000 soldiers?  Let’s see if we can find out why.

The Israelites were historically notorious for grumbling, complaining, and vocalizing fear whenever they faced an obstacle.  Here are a couple of examples;

Exodus 15:23-24 NIV [23] When they came to Marah, they could not drink its water because it was bitter. (That is why the place is called Marah.) [24] So the people grumbled against Moses, saying, “What are we to drink?”

This happened shortly after they went through the Red Sea on dry ground, by the way.

Then at the border of Cannon after the 10 out of 12 spies came back talking about the giants and well fortified cities in the land,

Numbers 13:32-33 NIV [32] And they spread among the Israelites a bad report about the land they had explored. They said, “The land we explored devours those living in it. All the people we saw there are of great size. [33] We saw the Nephilim there (the descendants of Anak come from the Nephilim). We seemed like grasshoppers in our own eyes, and we looked the same to them.”

So maybe, if Joshua had allowed them to speak during those six days of looking up at those intimidating walls, they may have started  infecting each other with doubt ("This isn't working," "Why are we just walking?"). So maybe God demanded silence to prevent their fleshly tongues from sabotaging their supernatural victory.

By enforcing complete vocal restraint, God ensured that when the command to "Shout!" finally came on the seventh day, the roar of the army was an undivided expression of collective, uncompromised faith.

Sometimes, the first step to spiritual victory in your life is simply calling a ceasefire on your negative words. If you can’t say anything that aligns with God's promises yet, it is better to be strategically silent. 

Now let’s look at a scripture that you hear from me every week.

Romans 10:9-10 NIV [9] If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. [10] For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved. 

Our mouth is what unlocks the ultimate victory: which is our salvation.

Belief in the heart is essential, but God requires it to be backed by a verbal declaration from the mouth. 

Why is it necessary to verbally declare that Jesus is Lord? 

In the ancient Greco-Roman world, to verbally declare "Jesus is Lord" was a massive, dangerous legal statement. It meant you were publicly declaring that Caesar was not your ultimate master. You were shifting your allegiance, your citizenship, and your submission to a higher King.

In the spiritual realm, your verbal confession is a legal document. When you speak the truth of God, you are enforcing the victory of the cross over your current circumstances.

When you practice true biblical confession, you aren't just making up positive thoughts or wishing upon a star. You are using your voice to say the exact same thing about your life that God says about your life. You are bringing your speech into agreement with the King of Kings.

Victory begins when you stop speaking your problems to God, and you start speaking God to your problems.

Mark 11:22-23 NIV [22]  “Have faith in God,” Jesus answered. [23] “Truly I tell you, if anyone says to this mountain, ‘Go, throw yourself into the sea,’ and does not doubt in their heart but believes that what they say will happen, it will be done for them. 

Jesus didn't tell you to talk about the mountain to everyone who will listen. He told you to talk to the mountain on the authority of His name.

• When the enemy whispers that you are worthless, you speak to that mountain: "I am fearfully and wonderfully made, chosen, and redeemed by the blood of the Lamb!"

Psalms 139:14 NIV says I praise you because I am fearfully and wonderfully made; your works are wonderful, I know that full well. and

Ephesians 1:4-6 NIV [4] For he chose us in him before the creation of the world to be holy and blameless in his sight. In love [5] he predestined us for adoption to sonship through Jesus Christ, in accordance with his pleasure and will— [6] to the praise of his glorious grace, which he has freely given us in the One he loves. 

AND 

Revelation 12:11 NIV They triumphed over him by the blood of the Lamb and by the word of their testimony; they did not love their lives so much as to shrink from death.

• When anxiety tells you your future is ruined, you speak to that mountain: 

Philippians 4:19 NIV And my God will meet all your needs according to the riches of his glory in Christ Jesus.

Jeremiah 29:11 NIV For I know the plans I have for you,” declares the Lord, “plans to prosper you and not to harm you, plans to give you hope and a future. 

Conclusion

Aligning our priorities with God's will is a continuous process. It demands that we regularly evaluate what we are broadcasting into our surroundings and our hearts.

On that seventh day at Jericho, when the trumpets sounded, Joshua gave the order: "Shout! For the Lord has given you the city!" When they released their voices in alignment with God's command, those thick, impossible walls collapsed flat into the dirt.

Joshua 6:20-21 NIV [20] When the trumpets sounded, the army shouted, and at the sound of the trumpet, when the men gave a loud shout, the wall collapsed; so everyone charged straight in, and they took the city. [21] They devoted the city to the Lord and destroyed with the sword every living thing in it—men and women, young and old, cattle, sheep and donkeys.

What walls are you facing today? Is it a wall of financial distress? A wall of broken relationships? A wall of addiction or depression?

It’s time to call a ceasefire on reckless talk, and start using your voice to declare the victory that Jesus Christ has already won on your behalf. Bring your heart into alignment, open your mouth, and let the truth of God reshape your environment.

Let’s bow our heads as we pray.

Sovereign Lord, You are the God who causes walls to fall. Forgive us for the times we have used our voices to validate our fears rather than declare Your faithfulness. Today, we turn off the frequency of defeat and we turn onto the frequency of faith. We confess with our mouths that Jesus Christ is Lord over our relationships, Lord over our struggles, and Lord over our futures. Give us the grace to speak Your promises directly to our problems. We thank You in advance for the walls that are going to fall. In the victorious name of Jesus, Amen.

Transforming the Heart, Taming the Tongue

This is the second sermon in the series "Watch Your Mouth",

Make a tree good and its fruit will be good, or make a tree bad and its fruit will be bad, for a tree is recognized by its fruit. You brood of vipers, how can you who are evil say anything good? For the mouth speaks what the heart is full of. A good man brings good things out of the good stored up in him, and an evil man brings evil things out of the evil stored up in him. But I tell you that everyone will have to give account on the day of judgment for every empty word they have spoken. For by your words you will be acquitted, and by your words you will be condemned. (Matthew 12:33-37 NIV)

We’ve all said things we wish we could take back, but managing our vocabulary with human willpower alone never seems to work. We will be looking at the spiritual anatomy of speech to uncover why our everyday talk is actually a heart issue—because just like a physical doctor checks your tongue to evaluate your bodily health, God uses our speech as a visible diagnostic tool for an invisible heart condition. The truth is, your mouth is simply the loudspeaker for as we dive into Matthew 12 and Luke 6 to discover how real, lasting transformation only happens when we surrender our inner reservoir to the Master Surgeon. 

Scripture 

Luke 6:37-49 NIV [37]  “Do not judge, and you will not be judged. Do not condemn, and you will not be condemned. Forgive, and you will be forgiven. [38] Give, and it will be given to you. A good measure, pressed down, shaken together and running over, will be poured into your lap. For with the measure you use, it will be measured to you.” [39] He also told them this parable: “Can the blind lead the blind? Will they not both fall into a pit? [40] The student is not above the teacher, but everyone who is fully trained will be like their teacher. [41]  “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye? [42] How can you say to your brother, ‘Brother, let me take the speck out of your eye,’ when you yourself fail to see the plank in your own eye? You hypocrite, first take the plank out of your eye, and then you will see clearly to remove the speck from your brother’s eye. [43]  “No good tree bears bad fruit, nor does a bad tree bear good fruit. [44] Each tree is recognized by its own fruit. People do not pick figs from thornbushes, or grapes from briers. [45] A good man brings good things out of the good stored up in his heart, and an evil man brings evil things out of the evil stored up in his heart. For the mouth speaks what the heart is full of. [46]  “Why do you call me, ‘Lord, Lord,’ and do not do what I say? [47] As for everyone who comes to me and hears my words and puts them into practice, I will show you what they are like. [48] They are like a man building a house, who dug down deep and laid the foundation on rock. When a flood came, the torrent struck that house but could not shake it, because it was well built. [49] But the one who hears my words and does not put them into practice is like a man who built a house on the ground without a foundation. The moment the torrent struck that house, it collapsed and its destruction was complete.”

Introduction: 

This is week two of our series, "Watch Your Mouth,".

Last week, we looked at the incredible, raw power of the tongue. We discovered that this tiny muscle sits behind our teeth like a stick of spiritual dynamite—capable of clearing the way for Kingdom progress, or blasting our relationships, families, and ministries to pieces. We realized that we have to watch our mouths because our words carry the power of life and death.

But today, we have to move from the symptom to the source.

Whenever you go to the doctor for a physical checkup, they will often ask you to perform a very simple task. They will pull out a tongue depressor, shine a little flashlight, and say, "Open up and say, 'Ah.'"

Now, why do they do that? The doctor isn't actually that interested in your tongue itself. They aren’t checking to see if your tongue is muscular or well-trained. They are looking at your tongue because the state of your tongue is a primary indicator of what is happening inside your body. It reveals signs of dehydration, infection, vitamin deficiencies, or digestive issues. The tongue is an external billboard for internal health.

In the exact same way, God uses our speech as a spiritual stethoscope. Your mouth is the billboard for your soul. If you want to know what the true condition of your spiritual life is, you don’t look at how high you jump on Sunday morning; you look at how you talk to people everyday.

Here’s our text for today’s sermon:

Text: 

Matthew 12:33-37 NIV[33]  “Make a tree good and its fruit will be good, or make a tree bad and its fruit will be bad, for a tree is recognized by its fruit. [34] You brood of vipers, how can you who are evil say anything good? For the mouth speaks what the heart is full of. [35] A good man brings good things out of the good stored up in him, and an evil man brings evil things out of the evil stored up in him. [36] But I tell you that everyone will have to give account on the day of judgment for every empty word they have spoken. [37] For by your words you will be acquitted, and by your words you will be condemned.”

1. The Mouth is Only a Loudspeaker

Notice the direct pipeline Jesus establishes here. He says in verse 34, "For the mouth speaks what the heart is full of."

The New King James translation puts it this way: "Out of the abundance of the heart the mouth speaks."

Imagine you are driving down the freeway, and a song comes on the radio that you absolutely despise. It’s annoying, it’s grating, and it's making you miserable. To fix the problem, do you pull over to the side of the road, grab a screwdriver, rip the dashboard apart, and start smashing the speakers?

Of course not! Why? 

Because you know the speaker didn't write the song. The speaker didn't produce the music. The speaker is just the delivery mechanism. The speaker is simply amplifying whatever station the tuner is dialed into. If you want to change what is coming out of the speaker, you don't fix the speaker—you change the station.

Your mouth is nothing more than a loudspeaker for your heart.

When you lose your temper and say something incredibly cruel to someone you love, and then immediately say, "I'm sorry, I don't know where that came from, that's not really me"—Jesus looks at us gently but directly and says, "Actually, yes it is."

The pressure of the moment didn't invent the anger; it just squeezed the heart until what was already inside leaked out of the mouth. If frustration, bitterness, insecurity, or jealousy are stored up in the reservoir of the heart, then frustration, bitterness, insecurity, and jealousy will inevitably pour out of the spigot of the lips.

Look at 

Luke 6:45 NIV A good man brings good things out of the good stored up in his heart, and an evil man brings evil things out of the evil stored up in his heart. For the mouth speaks what the heart is full of.

This is where so many of us stumble. We treat our speech like an etiquette problem instead of a spiritual problem.

We try to use willpower to "bite our tongue" or white-knuckle our way through a conversation without saying something reckless. 

We try to dress up the outside. But trying to fix your speech without addressing your heart is like taping apples onto a dead oak tree and trying to convince people you have a healthy orchard. The fruit might look attached for a moment, but there is no life flowing to it. It’s an illusion.

We cannot manage the tongue from the outside in. True alignment with God's will is a continuous process of deep self-reflection and inner transformation.

If your mouth struggles with gossip, the solution isn't just a vow of silence; it's asking God to heal the insecurity in your heart that makes you feel bigger by making others look smaller.

If your mouth struggles with constant complaining and cynicism, the solution isn't just forcing a smile; it's asking the Holy Spirit to root out the entitlement and ungratefulness in your heart, replacing it with an active awareness of God’s daily grace.

James 3:7-8 NIV [7] All kinds of animals, birds, reptiles and sea creatures are being tamed and have been tamed by mankind, [8] but no human being can tame the tongue. It is a restless evil, full of deadly poison.

Jesus raises the stakes significantly in verses 36 and 37 of our text He reminds us that our words are being recorded in Heaven's ledger. 

Matthew 12:36-37 NIV . [36] But I tell you that everyone will have to give account on the day of judgment for every empty word they have spoken. [37] For by your words you will be acquitted, and by your words you will be condemned.”

An "empty" word is a careless word. It’s a word spoken without regard for its kingdom impact. It’s the text message sent in a fit of rage, the sarcastic comment meant to sting, the white lie told to protect our pride.

Why is the judgment so severe for mere words? 

Because our words provide the undeniable evidence of who we actually are. They are the fruit that identifies the tree. Your words show whether the Holy Spirit is truly ruling the throne room of your heart, or if your flesh is still running the show.

Conclusion & Invitation: Changing the Reservoir

So, how do we change the station? How do we clean up the fruit? 

We have to change what is being stored in the reservoir.  

Look  at:Psalms 51:10 NIV Create in me a pure heart, O God, and renew a steadfast spirit within me.

David didn't pray, "Lord, fix my bad language." He prayed:

"Create in me a pure heart, O God, and renew a steadfast spirit within me."

Psalms 119:11 NIV says I have hidden your word in my heart that I might not sin against you.

This doesn't mean keeping it a secret. In ancient Hebrew culture, the "heart" wasn't just the seat of emotions; it was the center of your mind, thoughts, and decisions. "Hiding" something there means packing it away for safekeeping, like putting valuables in a vault. 

When you face a tough choice, a temptation, or a moment of crisis, you don't have to scramble to look up a rulebook. The right path is already inside you, ready to guide your reactions in real-time.

Think of it like a trained first responder. They don't read the manual during an emergency; they study it so intensely beforehand that when crisis hits, their training kicks in automatically. That is what internalizing scripture is meant to do for your daily life and faith.

If you fill the reservoir of your heart with the truth of God's Word, with the reality of His goodness, and with intentional gratitude, then when life squeezes you, grace is what will pour out. When a crisis hits you, faith is what will be broadcast through your loudspeaker.

Let’s stop trying to merely patch up our speech with human effort. Let’s invite the Master Physician to do a deep, internal heart work. Let’s slow down, practice regular self-reflection, and open ourselves up entirely to His guidance.

Most Holy God, we come before You today recognizing that our lips have often betrayed the true state of our hearts. Lord, we confess that bitterness, pride, and anxiety have too often found a microphone in our speech. We ask today for an internal transformation. Create in us pure hearts, O Lord. Flood the reservoirs of our souls with Your Holy Spirit and Your truth, so that every word that crosses our lips brings honor to Your name, builds up Your people, and reflects Your sovereign love. In the mighty and matchless name of Jesus we pray, Amen.