Who said “Laughter is by definition healthy.”?

“They laugh well who laugh last.”

“The loud laugh that spoke the vacant mind.”

“Against the assault of laughter nothing can stand.”

“The sound of laughter is like the vaulted dome of a temple of happiness.”

“That is the saving grace of humor, if you fail no one is laughing at you.”

“Space or science fiction has become a dialect for our time.”

“In university they don't tell you that the greater part of the law is learning to tolerate fools.”

“If a fish is the movement of water embodied, given shape, then cat is a diagram and pattern of subtle air.”

“It is terrible to destroy a person's picture of himself in the interests of truth or some other abstraction.”

“That is what learning is. You suddenly understand something you've understood all your life, but in a new way.”

“The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.”