"Spend and be spent."

"When you play, play hard; when you work, don't play at all."

"Do what you can, with what you have, where you are."

"The great virtue of my radicalism lies in the fact that I am perfectly ready, if necessary, to be radical on the conservative side."

"Nine-tenths of wisdom consists in being wise in time."

"The only man who never makes a mistake is the man who never does anything."

"Error always addresses the passions and prejudices; truth scorns such mean intrigue, and only addresses the understanding and the conscience."

"Have a strong mind and a soft heart."

"Civilization is very much an immature and ongoing experiment, the success of which is by no means yet proven."

"It may be risky to marry for love, but it's so honest that the Lord just has to smile on it."

"All progress is based on a universal innate desire on the part of every organism to live beyond its income."

"All things are difficult before they are easy."