Matthew 7:18 (KJV)

What does Matthew 7:18 mean?

Matthew 7:18 says that a good tree cannot produce bad fruit, and a bad tree cannot produce good fruit. This means that the true nature of something or someone will show itself in the results or actions that come from it.

In this verse, Jesus is speaking to a crowd during the Sermon on the Mount, warning them about false prophets and how to recognize them. He uses the image of trees and their fruit to teach that a person’s character and actions are deeply connected, and you can tell what someone is truly like by what they do.

The Greek behind Matthew 7:18

• "good" (ἀγαθός, agathos): This word means genuinely good or beneficial, not just outwardly pleasant. Jesus is emphasizing the true inner quality, not just appearances.
• "corrupt" (σαπρός, sapros): This Greek word means rotten or decayed, not just morally bad. It paints a picture of something spoiled from the inside out, unable to produce anything healthy.
• "fruit" (καρπός, karpos): In Greek, this word refers to the result or outcome of something. Here, it means the visible results of a person’s life or teaching, not just literal fruit.
• "cannot" (οὐ δύναται, ou dynatai): This phrase means it is not possible or not able. Jesus is stating this as an absolute: the nature of the tree makes it impossible to produce the opposite kind of fruit.

Why Matthew 7:18 matters

• Matthew 7:18 clears up the idea that someone can consistently hide their true character; over time, actions will reveal what is inside.
• The verse emphasizes that real goodness or corruption is a matter of nature, not just behavior, highlighting the importance of what is at the core of a person or teaching.
• This teaching connects directly to Jesus’ warning about false prophets in the surrounding verses, helping listeners understand how to discern truth from falsehood by looking at consistent results.