“If you can’t explain it simply, you don’t understand it well enough.”

Success is not about how much you accumulate, but how much you contribute.

A wise man gets more use from his enemies than a fool from his friends.

Perception is real even when it is not reality.

“You can do it if you believe you can!”

A person will sometimes devote all his life to the development of one part of his body—the wishbone.

True happiness is not attained through self-gratification, but through fidelity to a worthy purpose.