God Never Changes

"God cannot change for the better. Since He is perfectly holy, He has never been less holy than He is now and can never be holier than He has always been. Neither can God change for the worse. Any deterioration within the unspeakably holy nature of God is impossible. Indeed I believe it impossible even to think of such a thing, for the moment we attempt to do so, the object about which we are thinking is no longer God but something else and someone less than He. The one of whom we are thinking may be a great and awesome creature, but because he is a creature he cannot be the self-existent Creator."

A.W. Tozer, The Knowledge of the Holy (HarperCollins, 1961), p. 49.