Orthodoxy, or right opinion, is, at best, a very slender part of religion. Though right tempers cannot subsist without right opinions, yet right opinions may subsist without right tempers. There may be a right opinion of God without either love or one right temper toward Him. Satan is a proof of this....
Christianity tells people to repent and promises them forgiveness. It therefore has nothing (as far as I know) to say to people who do not know that they have done anything to repent of and who do not feel that they need any forgiveness. –C. S. Lewis in Mere Christianity