Bear Fruit: The Transforming Power of a New Nature

Illustration (Superman): In Man of Steel, Clark wrestles with who he really is. Was he sent to conquer or to save? Pa Kent tells him: “Your choices, your actions, that’s what makes you who you are.”

That’s the way most people think—our actions define us. “I’m a good person because I do good things” or “I’m a bad person because of what I’ve done or what’s been done to me.”

But Jesus flips this idea on its head. He says our problem is not just what we do but who we are. Our nature determines our fruit.

Thesis: According to Luke 6:43–45, our sin problem is a nature problem. We don’t just need new behavior; we need a new heart—a new nature—through Jesus Christ. Only then will we bear fruit that glorifies God.

Big Idea: “Your root determines your fruit.”

Read Luke 6:43–45 Transition: Let’s walk through this passage and see the problem, the solution, and the result.

Luke 6:43–45 ESV

“For no good tree bears bad fruit, nor again does a bad tree bear good fruit, for each tree is known by its own fruit. For figs are not gathered from thornbushes, nor are grapes picked from a bramble bush. The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks.

The Problem: Sin Is a Nature Problem (Luke 6:43–45)

Scripture: Reread Luke 6:43–45.

Explanation:

Jesus’ metaphor: every tree produces fruit according to its nature.

A bad tree = bad fruit. Our sinful nature = sinful actions, words, attitudes.

You can try to polish or paint the fruit, but rotten fruit still comes from rotten roots.

Jeremiah 17:9 — “The heart is deceitful above all things, and desperately sick; who can understand it?”

Illustration: It’s like spraying Febreze on spoiled milk—it doesn’t change the source. Our problem runs deeper than appearance; it’s the heart.

Punch Line: “Your root determines your fruit—and if the root is rotten, the fruit will be too.”

Our problem isn’t just what we do—it’s who we are by nature. Where is your “fruit” revealing a deeper root problem?

Transition: If bad roots always produce bad fruit, then we desperately need a new root. “Your root determines your fruit—so we need Christ to give us a new one.”

The Solution: A New Nature Through Christ

Texts: 2 Corinthians 5:17–21; Romans 11:17–18; James 1:21

Explanation:

2 Cor. 5:17 — “If anyone is in Christ, he is a new creation.” This isn’t self-improvement; it’s new birth.

v. 21 — Christ takes our sin and gives us His righteousness.

Romans 11:17–18 — like a wild branch grafted into a healthy tree, we are engrafted into Christ.

James 1:21 — the “engrafted word” (gospel) saves and reshapes us.

Illustration: A gardener grafts a weak, dying branch into a healthy tree. That branch doesn’t survive by its own power—it thrives because it draws life from the tree. That’s us in Christ.

Punch Line: “When Christ becomes your root, He changes your fruit.”

Application:

Stop trusting in self-help or religion. Only Christ gives a new nature.

To unbelievers: receive Christ today.

To believers: remember—transformation comes not from effort alone but abiding in Christ.

Transition: So what happens when you’re grafted into Christ? A new nature leads to new fruit.

The Result: New Fruit from a New Nature (John 15:1–10)

Scripture: Read John 15:1–10.

John 15:1–10 ESV

“I am the true vine, and my Father is the vinedresser. Every branch in me that does not bear fruit he takes away, and every branch that does bear fruit he prunes, that it may bear more fruit. Already you are clean because of the word that I have spoken to you. Abide in me, and I in you. As the branch cannot bear fruit by itself, unless it abides in the vine, neither can you, unless you abide in me. I am the vine; you are the branches. Whoever abides in me and I in him, he it is that bears much fruit, for apart from me you can do nothing. If anyone does not abide in me he is thrown away like a branch and withers; and the branches are gathered, thrown into the fire, and burned. If you abide in me, and my words abide in you, ask whatever you wish, and it will be done for you. By this my Father is glorified, that you bear much fruit and so prove to be my disciples. As the Father has loved me, so have I loved you. Abide in my love. If you keep my commandments, you will abide in my love, just as I have kept my Father’s commandments and abide in his love.

Jesus is the true Vine. If we abide in Him, we bear fruit that glorifies God.

Marks of New Fruit:

Passionate Prayer Life (v. 7)

When abiding in Christ, our prayers align with His will.

Faithful Witness (v. 8)

Bearing fruit proves discipleship and points others to Christ.

Deepening Love (vv. 9, 12)

Abiding in His love produces sacrificial love for others.

Growing Obedience (v. 10)

New nature leads to joyful obedience, not grudging duty.

Additional Fruit: Joy, peace, patience (Gal. 5:22–23).

Think of someone whose life you’ve seen transformed—new joy, new love, new obedience. Their fruit points to a new root in Christ.

Application:

Evaluate your fruit: Does your prayer, witness, love, and obedience reflect Christ?

Pick one area this week—commit to grow in prayer, witness, love, or obedience.

Remember: fruit comes from abiding, not striving.

Conclusion (5–7 minutes)

Summary:

Problem: Sin is a nature problem (Luke 6:43–45).

Solution: A new nature through Christ (2 Cor. 5:17–21; Romans 11; James 1).

Result: New fruit from a new nature (John 15).

Call to Action:

Non-believers: Receive Christ’s new nature by faith.

Believers: Abide daily in Christ—through prayer, the Word, and fellowship—so that you bear lasting fruit.

Final Echo: “Your root determines your fruit—so root yourself in Christ, and your life will bear fruit that glorifies God.”