Matthew 7:15 Meaning

13Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:

14Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.

15Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.

16Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?

17Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.