Luke 6:43 Meaning: Known by Our Fruit

The Greek word for “good” here is kalos. It means beautiful, useful, excellent, the kind of tree that is healthy and fulfilling its purpose. The word for “rotten” or “bad” is sapros, which literally means putrid, rotten, stale, no longer fit for use. Jesus is not talking about a tree that had a bad season or produced one disappointing piece of fruit. A sapros tree is decayed at the core. And the word for “produces” (poioun) is a present participle, continuous action, not a one-time event. This is the tree’s ongoing habit. A good tree consistently bears good fruit because that is its nature. A rotten tree cannot suddenly produce something good, any more than a dead tree can sprout apples. The verse calls us to ask: what is my nature producing, day after day?

Christians across traditions have read this verse as a call to honest self-examination. Many Reformed commentators, following Calvin, see it as a warning against hypocritical judging, the “for” connects directly to the beam-and-speck passage. Catholic and Orthodox readers often emphasize that good works flow from a heart transformed by grace, so the fruit reveals the inner life. Early Methodist writers like Adam Clarke focused on the meaning of “rotten” fruit, things unfit for use, worthless in God’s service. Pentecostal and charismatic traditions sometimes apply the verse to testing spiritual teachers: does their teaching produce true godliness? All these readings share the same core: what we see on the outside tells the truth about what is inside.

A common mistake is to use this verse as a quick tool to label other people as “bad trees” and dismiss them. In fact, Jesus places this saying right after his sharp warning about the beam in your own eye. He wants you to start with yourself. The verse is first a mirror, not a magnifying glass for others’ faults. Apply it to yourself before you apply it to anyone else.

This week, watch your own fruit. Notice the words that come out of your mouth when you are tired or frustrated. Notice the small choices you make when no one is watching. Instead of scanning others for signs of rot, take a quiet look at what your own life is producing. Ask God to show you one area where your actions don’t match what you say you believe. A good tree does not happen by effort alone, it is rooted in good soil. Spend time in that soil, and let the fruit take care of itself.