Proverbs 19:27

Cease, my son, to hear the instruction that causeth to err from the words of knowledge.

The call is to cease listening to instruction that causes error and wandering away from the words of knowledge. Teaching of that kind is not to be received but to be rejected as false. It is recognized as false teaching when it stands in conflict with God's word. It is likewise recognized when it makes light of His moral law or instructs people to break His commandments, for these are the marks of false teachers.