At mile 20 I thought I was dead. At mile 22 I wished I was dead. At mile 24 I knew I was dead. At mile 26.2 I realized I had become to tough to kill.
Your biggest challenge isn't someone else. It's the ache in your lung and, and the burning in your legs, and the voice inside you that yells "can't", but you don't listen. You just push harder. And then you hear the voice whisper "can". And you discover that the person you thought you were, is no match for the one you really are.