"There is no royal road to anything. One thing at a time, all things in succession. That which grows fast, withers as rapidly. That which grows slowly endures."

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

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

"It is a great pity that people so often judge by what they see and hear and never by what is felt."

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