"We must not say every mistake is a foolish one."

"A life of peace, purity, and refinement leads to a calm and untroubled old age."

"The wise are instructed by reason; ordinary minds by experience; the stupid, by necessity; and brutes by instinct."

"What we call pleasure, and rightly so is the absence of all pain."

"He removes the greatest ornament of friendship, who takes away from it respect."

"I prefer tongue-tied knowledge to ignorant loquacity."

"Who you are isn't tied solely to what you say, even though it may feel that way to you now."

"Philosophy consists very largely of one philosopher arguing that all others are jackasses. He usually proves it, and I should add that he also usually proves that he is one himself."

"This is patently absurd; but whoever wishes to become a philosopher must learn not to be frightened by absurdities."

"One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another."

"The point of philosophy is to start with something so simple as not to seem worth stating, and to end with something so paradoxical that no one will believe it."

"There's a difference between a philosophy and a bumper sticker."