"The great thing in the world is not so much to seek happiness as to earn peace and self-respect."

"Sit down before fact as a little child, be prepared to give up every conceived notion, follow humbly wherever and whatever abysses nature leads, or you will learn nothing."

"I do not say think as I think, but think in my way. Fear no shadows, least of all in that great spectre of personal unhappiness which binds half the world to orthodoxy."

"No delusion is greater than the notion that method and industry can make up for lack of mother-wit, either in science or in practical life."

"It's hard to be humble, when you're as great as I am."

"It is a profound truth that the distance between ambition and reality is bridged solely by consistent effort."

"One cannot and must not try to erase the past merely because it does not fit the present."

"Fanaticism consists of redoubling your effort when you have forgotten your aim."