We do it in every other situation we find ourselves in. In every ditch, valley, pit we fall into.

You forget someone’s birthday - she wouldn’t have bothered anyway. Your friends forget yours - you weren’t planning to have anything special in the first place. You lose fifty bucks - you were probably going to waste it on something stupid and irrelevant like a dress you were never going to wear. You can’t find a job - you probably wouldn’t have enjoyed any one of those you had applied for anyway. A friendship ends - it was going to come to this some day. He falls in love with someone else - he was never good enough for you anyway, and in any case both of you were never good for each other. You leave God out of your life - He probably didn’t enjoy my presence all that much either. 

Rationality could save you - or finish you.