"If we judge of love by its usual effects, it resembles hatred more than friendship."

"Men would not live long in society were they not the dupes of one another."

"We would rather speak ill of ourselves than not talk about ourselves at all."

"What is called liberality is often merely the vanity of giving."

"Leave no stone unturned."

"The only relevant test of the validity of a hypothesis is comparison of prediction with experience."

"It disturbs me no more to find men base, unjust, or selfish than to see apes mischievous, wolves savage, or the vulture ravenous."

"When schools flourish, all flourishes."