Wolves in Sheep's clothing

Matthew 7 v 13-23

13 Enter ye in at the strait gate: for wide is the gate, and broad is the way that leads to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
15 Beware of false prophets, which come to you in sheep’s clothing, but inwardly are ravenous 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 bringeth 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.
21 Not everyone that saith unto me Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.