Beware of false prophets.
Matthew 7:15-20.
15 "Beware of false prophets who come to you in sheep's clothing but inside they are ravenous wolves. 16 By their fruits you will recognize them. Are grapes gathered from thorns, or figs from thistles? 17 So, every healthy tree bears good fruit, but the diseased tree bears bad fruit. 18 A healthy tree cannot bear bad fruit, nor can a sick tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Thus you shall recognize them by their fruits.