In a democracy, the individual enjoys not only the ultimate power but carries the ultimate responsibility.

I have learned never to underestimate the capacity of the human mind and body to regenerate - even when prospects seem most wretched. The life force may be the least understood force on earth.

Nature has not been lavish in her endowments, but each person has his or her own potential in terms of achievement and service. The awareness of that potential is the discovery of purpose; the fulfillment of that potential is the discovery of strength.

All this sensory input, which begins in the brain, has its effect throughout the body.

Pain is part of the body's magic. It is the way the body transmits a sign to the brain that something is wrong.

An adequate share of humor and laughter represents an essential part of the diet of the healthy person.

The control center of your life is your attitude.