5 Bible Verses about Teachers, Of False Doctrines

I urge you, brethren, to take note of those who cause divisions and difficulties, contrary to the doctrine which you have learned; avoid them. For such persons do not serve our Lord Christ, but their own appetites, and by smooth and flattering words they deceive the hearts of the simple.

and from among your own selves will arise men speaking perverse things, to draw away the disciples after them.

And many will follow their licentiousness, and because of them the way of truth will be reviled.

Now the Spirit expressly says that in later times some will fall away from the faith by giving heed to deceitful spirits and doctrines of demons,

I am astonished that you are so quickly deserting him who called you by the grace of Christ and turning to a different gospel which is really not another gospel; but there are some who are disturbing you, and want to pervert the gospel of Christ.