The full acting out of the self's surrender to God therefore demands pain: this action, to be perfect, must be done from the pure will to obey, in the absence, or in the teeth, of inclination
C. S. LewisThe Christian life is simply a process of having your natural self changed into a Christ self, and that this process goes on very far inside. One's most private wishes, one's point of view, are the things that have to be changed.
C. S. Lewis