[15] Beware of false prophets, which come to in sheep's clothing, but inwardly ravening wolves. [16] Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles? [17] Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. [18] A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. [19] Every tree not forth good fruit is hewn down, and cast into the fire. [20] Wherefore by their fruits ye shall know them.