If one can stick to the training throughout the many long years, then will power is no longer a problem. It's raining? That doesn't matter. I am tired? That's besides the point. It's simply that I just have to.

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

When a person trains once, nothing happens. When a person forces himself to do a thing a hundred or a thousand times, then he certainly has developed in more ways than physical. Will power is no longer a problem. It's raining? That doesn't matter. I am tired? That's besides the point. It's simply that I just have to.