Matthew 7:13-20

Enter in through the narrow gate, for wide the gate and broad the way that leads to destruction, and many are they who enter in through it. For narrow the gate and straitened the way that leads to life, and they are few who find it. But beware of false prophets, which come to you in sheep's clothing, but within are ravening wolves. By their fruits ye shall know them. Do men gather a bunch of grapes from thorns, or from thistles figs? So every good tree produces good fruits, but the worthless tree produces bad fruits. A good tree cannot produce bad fruits, nor a worthless tree produce good fruits. Every tree not producing good fruit is cut down and cast into the fire. By their fruits then surely ye shall know them.