“A hero can be afraid, but a hero never runs away.”

“A lady's imagination is very rapid; it jumps from admiration to love, from love to matrimony in a moment.”

“I've always said that idleness dulls the spirit. We have to keep the brain busy, or at least the hands if we don't have a brain.”

“If your workplace was somehow transplanted into the jungle and everyone was forced to survive at a very primitive level, it's safe to say that eventually your boss would rape you.”

“You cannot teach a man anything, you can only help him find it within himself.”

“It is easier to write a book with footnotes than the same book written so that children can understand it.”

“I never teach my pupils, I only attempt to provide the conditions in which they can learn.”