We don't have to be smarter than the rest. We have to be more disciplined than the rest.

The whole point is to discipline the mind.

We should take care not to make the intellect our goal; it has, of course, powerful muscles, but no personality.

I enjoyed the discipline and solitariness of long-distance running, which allowed me to escape from the hurly-burly of school life.

We've got to put a lot of money into changing behavior.

Exercise dissipates tension, and tension is the enemy of serenity. I found that I worked better and thought more clearly when I was in good physical condition, and so training became one of the inflexible disciplines of my life.