“Duty is what one expects from others.”

“The first duty in life is to be as artificial as possible.  What the second duty is no one has as yet discovered.”

“If one hears bad music, it is one's duty to drown it in conversation.”

“The one duty we owe to history is to rewrite it.”

“On an occasion of this kind it becomes more than a moral duty to speak one's mind. It becomes a pleasure.”

“There are only two tragedies in life: one is not getting what one wants, and the other is getting it.”

“Always borrow money from a pessimist. He won't expect it back.”