"'Change' is scientific, 'progress' is ethical; change is indubitable, whereas progress is a matter of controversy."

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

"The good life, as I conceive it, is a happy life. I do not mean that if you are good you will be happy - I mean that if you are happy you will be good."

"Science may set limits to knowledge, but should not set limits to imagination."

"I think we ought always to entertain our opinions with some measure of doubt. I shouldn't wish people dogmatically to believe any philosophy, not even mine."

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

"Any artist should be grateful for a naive grace which puts him beyond the need to reason elaborately."

"If a man cannot choose, he ceases to be a man."

"It's a sure sign of summer if the chair gets up when you do."

"To get the best out of a man go to what is best in him."

"Government is like Junior High. Your status depends upon whom you're able to persecute."

"When the doors of perception are cleansed, man will see things as they truly are, infinite."