I try to recognize that there is no such thing as having it all - and it's impossible to be perfect. You just have to let certain things go.
You must accept that you might fail; then, if you do your best and still don't win, at least you can be satisfied that you've tried. If you don't accept failure as a possibility, you don't set high goals, you don't branch out, you don't try - you don't take the risk.
Nature is a book, a letter, a fairy tale (in the philosophical sense) or whatever you want to call it.