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

"If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is another step forward."

"I never did a day's work in my life. It was all fun."

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

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

"To invent, you need a good imagination and a pile of junk."

"Justice is the greatest interest of man on earth."

"I'm not against God, I'm against the misuse of God."

"It is a kind of spiritual snobbery that makes people think they can be happy without money."

"Person to person, moment to moment, as we love, we change the world."

"'A penny for your thoughts?' 'A dollar for your death.'"

"To save your world you asked this man to die; Would this man, could he see you now, ask why?"