I have always believed exercise is a key not only to physical health but to peace of mind.

In general, any form of exercise, if pursued continuously, will help train us in perseverance. Long-distance running is particularly good training in perseverance.

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.

I've been clean for ages, I'm at the gym all the time, everyone feels good.

No citizen has a right to be an amateur in the matter of physical training... what a disgrace it is for a man to grow old without ever seeing the beauty and strength of which his body is capable.

To be in good moral condition requires at least as much training as to be in good physical condition.