"There are two motives for reading a book: one, that you enjoy it; the other, that you can boast about it."

"If an opinion contrary to your own makes you angry, that is a sign that you are subconsciously aware of having no good reason for thinking as you do."

"In all affairs, it's a healthy thing now and then to hang a question mark on the things you have long taken for granted."

"The most savage controversies are those about matters as to which there is no good evidence either way."

"Aristotle maintained that women have fewer teeth than men; although he was twice married, it never occurred to him to verify this statement by examining his wives' mouths."