Matthew 7:15-20
“Beware of false prophets, which come to you in sheep's clothing, but inwardly they are 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 that bringeth not forth good fruit is hewn down, and cast into the fire. 20 Wherefore by their fruits ye shall know them.”
Romans 11:16 “For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.”
Jeremiah 23:29 Is not MY WORD like as a fire? Saith The LORD; and like a hammer that breaketh the rock in pieces?