Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?

By their fruit you will recognize them. Are grapes gathered from thornbushes, or figs from thistles?

Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.

Likewise, every good tree bears good fruit, but a bad tree bears bad fruit.

A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.

A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit.