"No pessimist ever discovered the secrets of the stars, or sailed to an unchartered land, or opened a new heaven to the human spirit."

"I am not afraid of storms, for I am learning how to sail my own ship."

"What we have once enjoyed we can never lose. All that we love deeply becomes a part of us."

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it."

"The mind is not a vessel to be filled, but a fire to be kindled."