A good rule (in testing a spiritual experience) is this: If this experience has served to humble me and make me little and vile in my own eyes it is of God; but if it has given me a feeling of self-satisfaction it is false and should be dismissed as emanating from self or the devil. Nothing that comes from God will minister to my pride or self-congratulation. If I am tempted to be complacent and to feel superior because I have had a remarkable vision or an advanced spiritual experience, I should go at once to my knees and repent of the whole thing. I have fallen a victim to the enemy.
Our relation to and our attitude toward our fellow Christians is another accurate test of religious experience. Sometimes an earnest Christian will, after some remarkable spiritual encounter, withdraw himself from his fellow believers and develop a spirit of faultfinding. He may be honestly convinced that his experience is superior, that he is now in an advanced state of grace, and that the hoi polloi in the church where he attends are but a mixed multitude and he alone a true son of Israel. He may struggle to be patient with these religious worldlings, but his soft language and condescending smile reveal his true opinion of them-and of himself. This is a dangerous state of mind, and the more dangerous because it can justify itself by the facts. The brother has had a remarkable experience; he has received some wonderful light on the Scriptures; he has entered into a joyous land unknown to him before. And it may easily be true that the professed Christians with whom he is acquainted are worldly and dull and without spiritual enthusiasm. It is not that he is mistaken in his facts that proves him to be in error, but that his reaction to the facts is of the flesh. His new spirituality has made him less charitable.
--A.W.Tozer