I want you to think about this. This sport is special. It is different from almost all others. In no other sport do you compete against nothing but yourself in such a profound and easily-measured way. Your only real opponent is your own mind, your belief in your ability. Your mind will try to tell you all sorts of things when you get to the pain cave. You are tired. You can't go on. You are not a good runner. You aren't fast. This hurts. On and on and on.
I would encourage you to learn your own limits. Only when you push your mind to stop talking to you so negatively will you begin to find out who you really are.
