"Friendship is unnecessary, like philosophy, like art. It has no survival value; rather it is one of those things which give value to survival."

"Is politics nothing other than the art of deliberately lying?"

"The art of medicine consists of amusing the patient while nature cures the disease."

"Mistakes are the necessary steps in the learning process; once they have served their purpose, they should be forgotten and not repeated."

"Success demands singleness of purpose."

"The whole art of government consists in the art of being honest."