"Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your own failings, passions, and prejudices so you can separate them from what you see."

"If you have made a mistake, cut your losses as quickly as possible."

"Old age is always fifteen years older than I am."

"Never answer a critic, unless he's right."

"The surprising thing about young fools is how many survive to become old fools."

"I am an old man, but in many senses a very young man. And this is what I want you to be, young, young all your life."

"As we grow olda€|the beauty steals inward."

"An old doting fool, with one foot already in the grave."

"Young people have an almost biological destiny to be hopeful."

"The heads of strong old age are beautiful beyond all grace of youth."