After all, this is how you learned how to walk. You didn't just jump up from your crib one day and waltz gracefully across the room. You stumbled and fell on your face and got up and tried again. At what age are you suddenly expected to know everything and never make any more mistakes? If you can love and respect yourself in failure, worlds of adventure and new experiences will open up before you, and your fears will vanish.
Feeling Good: The New Mood Therapy (ed. 1980)