"I wonder whether you are on the right track in expecting 'stable sentiments' and successful adjustment to life.' This is the language of modern psychology rather than of religion or even of common experience, and I sometimes think that when the psychologists speak of adjustment to life they really mean perfect happiness and unbroken good fortune! Not to get - or, worse still, to be- what one wants is not a disease that can be cured, but the normal condition of man. To feel guilty, when one is guilty, and to realise, not without pain, one's moral and intellectual inadequacy, is not a disease, but commonsense. To find that one's emotions do not 'come to heel' and line up as stable sentiments in permanent conformity with one's convictions is simply the facts of being a fallen, and still imperfectly redeemed, man. We may be thankful if, by continual prayer and self-discipline, we can, over years, make some approach to that stability. After all, St. Paul who was a good deal further along the road than you and I, could still write Romans, chapter 7, verses 21-23."

-----C.S. Lewis, from a letter to Michael Edwards (BOD) in "The Collected Letters of C.S. Lewis: Volume III"