Try for a goal that's reasonable, then gradually raise it.

Is it raining? That doesn't matter. Am I tired? That doesn't matter, either. Then willpower will be no problem.

I was unable to walk for a whole week after that, so much did the race take out of me. But it was the most pleasant exhaustion I have ever known.

Why should I practice running slow? I already know how to run slow. I want to learn to run fast.

An athlete cannot run with money in his pockets. He must run with hope in his heart and dreams in his head.

You can't climb up to the second floor without a ladder. When you set your aim too high and don't fulfill it, then your enthusiasm turns to bitterness. Try for a goal that's reasonable, and then gradually raise it.

It's at the borders of pain and suffering that the men are separated from the boys.