Jesus said, “A good tree* cannot* bear bad fruit, and a bad tree *cannot *bear good fruit.” ie. A good man cannot do evil, and an evil man cannot do good. This is a stunning insight. Good and evil are mutually exclusive, just as North and East are mutually exclusive. Or Darkness and Light.
When accused of being empowered by Beelzebub (which means “Lord of the Flies”), Jesus said, “A kingdom divided against itself will fall.” ie. Evil cannot do good. Why not? Because the moment evil does good, it ceases to be evil, and self-destructs. (In the same way, the moment you head East, you no longer head North. The moment you turn on the light, you are no longer in darkness.) Since healing the sick is good, the power to heal must come from God rather than the devil. QED.
But things don’t seem quite this simple. I find both good and bad fruit in my life. I conclude I am both a “good tree” and a “bad tree” simultaneously. Jesus underscores the fundamental paradox that lies at the heart of human nature when he says, “You who are evil know how to give good gifts to your children…” If we are 100% evil, we’d not know how to give good gifts. But we do know how, which is good. Therefore, we are both good and evil.
John Baptist tells us, “The ax is already at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.”
What is destroyed in the fire? The tree that produces evil fruit. ie. the evil that is found in each one of us.