What you learn is often determined by what you need to know. If you think you're weak, you will learn that you are strong. If you think you are indestructible, you will learn that you are fragile.
In the end though, you will learn that you are human. You are no more and no less than all those who are learning their lessons as you learn yours.

Running for Mortals: A Commonsense Plan for Changing Your Life through Running (ed. Rodale, 2007) - ISBN: 9781605297736