In the words of C.S. Lewis: 

"A proud man is always looking down on things and people; and, of course, as long as you're looking down, you can't see something that's above you."

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"The great thing, if one can, is to stop regarding all the unpleasant things as interruptions of one's 'own,' or 'real' life. The truth is of course that what one calls the interruptions are precisely one's real life -- the life God is sending one day by day." 

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"A silly idea is current that good people do not know what temptation means. This is an obvious lie. Only those who try to resist temptation know how strong it is.... A man who gives in to temptation after five minutes simply does not know what it would have been like an hour later. That is why bad people, in one sense, know very little about badness. They have lived a sheltered life by always giving in."