The human spirit will not even begin to try to surrender self-will as long as all seems to be well with it. Now error and sin both have this property, that the deeper they are the less their victim suspects their existence; they are masked evil. Pain is unmasked, unmistakable evil; every man knows that something is wrong when he is being hurt.
C. S. LewisThe dangers of apparent self-sufficiency explain why Our Lord regards the vices of the feckless and dissipated so much more leniently than the vices that lead to worldly success.
C. S. LewisI suggest to you that it is because God loves us that he gives us the gift of suffering. Pain is God's megaphone to rouse a deaf world. You see, we are like blocks of stone out of which the Sculptor carves the forms of men. The blows of his chisel, which hurt us so much are what make us perfect.
C. S. Lewis