"To be good is noble, but to teach others how to be good is nobler and no trouble."

"Of all the things I've lost, I miss my mind the most."

"It is noble to teach oneself, but still nobler to teach others — and less trouble."

"The only way to keep your health is to eat what you don't want, drink what you don't like, and do what you'd rather not."

"The very first thing which a man has to do, in order to learn how to do a thing, is to learn how to unlearn it."