"Hell, there are no rules here--we're trying to accomplish something."

"Faith, as well intentioned as it may be, must be built on facts, not fiction--faith in fiction is a damnable false hope."

"There is no expedient to which a man will not go to avoid the labor of thinking."

"If we all did the things we are capable of doing, we would literally astound ourselves."

"Many of life's failures are those who didn't know how close they were to success when they gave up."

"Genius is one per cent inspiration, ninety-nine per cent perspiration."

"It is better to live for one day as a tiger than to live for a thousand years as a sheep."

"The more I see of men, the better I like dogs."

"It is in vain to say human beings ought to be satisfied with tranquillity: they must have action; and they will make it if they cannot find it."

"Art is science made clear."

"If you aspire to the highest place, it is no disgrace to stop at the second, or even the third, place."

"I feel about airplanes the way I feel about diets. It seems to me they are wonderful things for other people to go on."