Have you ever tried to mix two things that just don’t go together? Maybe it’s wearing socks with sandals — in the Midwest, that’s practically a crime. Paul uses a similar idea in Ephesians 4 when he tells the church: you don’t straddle the line between your old life and your new life in Christ. You’re not supposed to mix and match. You are new. And that new identity changes everything — including the words that come out of your mouth.
Watch Your Words
Paul has been walking through a list of commands in Ephesians 4 — stop lying, speak truth, stop stealing, work and give. Now he lands on one of the most convicting passages about speech in all of Scripture.
“Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen.”
— Ephesians 4:29
Paul calls unwholesome words rotten — like spoiled meat or rancid fish. That’s a strong picture. He’s saying: have a filter. Not every word that pops into your head needs to leave your mouth. In fact, some words are so destructive, so putrid, that they should never be spoken at all.
But it’s not just about what we don’t say. It’s about what we do say. Paul pivots immediately: speak words that build. Not random building — building others up. Specifically according to their needs.
Enter Someone Else’s Construction Zone
Pastor Josh used a memorable illustration: every time you walk into a conversation with someone, you’re walking into their construction zone. They’re building something — a home, a life, a marriage, a walk with God. And your words are either lumber and nails… or a wrecking ball.
The question isn’t just “Are my words true?” The question is: Do I know where this person is? Am I walking into their construction zone and trying to build my greenhouse in their house? Or am I listening — really listening — to understand where they are and what they actually need?
Sometimes that means speaking less. Sometimes it means finally speaking up. But it always means caring more about their growth than about being right or looking wise.
“Do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.”
— Ephesians 4:30
You Are God’s Possession
Paul adds a stunning layer: our words don’t just affect others — they affect the Holy Spirit who lives in us. When we speak rotten words, we grieve God himself. Why? Because we belong to Him. We are His possession, sealed by the Spirit for the day when He finally redeems everything.
So how we speak to people isn’t casual. It’s deeply spiritual. It’s worship or it’s grief.
Pull Out the Rot, Build With Grace
Then Paul gets very specific about what must go — and what must replace it.
“Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.”
— Ephesians 4:31-32
Bitterness is especially dangerous. As Pastor Josh noted, quoting Andy Stanley: “You cannot be a builder if you’re bitter.” Bitterness seeps into our tone, our attitude, our words. It corrupts everything it touches. And it doesn’t care who you are — it can grow in anyone’s heart: from a critical parent, a disappointing marriage, a boss who never followed through, a friend who betrayed you, or even a church that failed you.
The call is radical: forgive. Not because the other person deserves it. Not because reconciliation is always possible. But because you have been forgiven much more by Christ. Forgiveness isn’t forgetting — it’s letting go of the right to get even. It’s releasing the anger and choosing grace.
So What?
Two questions Pastor Josh left us with:
- Where do I have work to do? — In my speech, my attitude, my bitterness, my willingness to listen.
- Who cannot wait for me to get to work? — Someone in my life who needs me to grow in this area so I can build them up instead of tearing them down.
If you are holding onto bitterness, get help. Confess it to a fellow believer. Write it down — what happened, what it cost you — crumple it up, and throw it in the garbage. You can forgive even when the other person never asks.
And memorize Ephesians 4:29-32. Let these words shape you. Let them be your filter, your compass, your construction guide.
Because your words have power. Choose to build.
Scripture References
- Ephesians 4:17-24 — The old self vs. the new self in Christ
- Ephesians 4:25-28 — Speaking truth, working, giving
- Ephesians 4:29 — Words that build up rather than tear down
- Ephesians 4:30 — Do not grieve the Holy Spirit
- Ephesians 4:31-32 — Put off bitterness, put on kindness and forgiveness