In Ephesians 4:13, Apostle Paul says that we are to grow up gradually “to a mature man, to the fullness of the stature of Christ”. Our aim must be to grow ourselves and to help others to grow to this fullness. We must not remain babies “tossed here and there by waves and carried about by every wind of doctrine, by the trickery of men, by craftiness in deceitful scheming” (Ephesians 4:14).
God allows us to be exposed to deception and false teaching so that we can grow in discernment. Our sense of discernment will not be developed otherwise. That’s why He allows so many deceivers and false prophets to move around in Christendom. Thus we will be able to discern the one whose spirit is not right from the one whose spirit is right. We don’t have to judge others. But we must discern. Then our spiritual senses will be exercised.