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

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

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

Exercise till the mind feels delight in reposing from the fatigue.

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.