Matthew 12:33

Jesus proceeded to point out that conduct typically reflects character (Matthew 12:33-37; cf. Matthew 7:16-19). To have good fruit one must make the tree good, for example by cultivating, grafting, fertilizing, etc. If one makes a tree rotten by neglect and abuse, for example, one will get bad fruit. A good tree produces good fruit, and a bad tree yields bad fruit. Jesus’ works were good, so He must be good.