“We often miss opportunity because it's dressed in overalls and looks like work”

“I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.”

“Nature is what we know. We do not know the gods of religions. And nature is not kind, or merciful, or loving. If God made me the fabled God of the three qualities of which I spoke: mercy, kindness...”

“I have not failed. I've just found 10,000 ways that won't work.”

“Many of life's failures are people who did not realize how close they were to success when they gave up.”

“When you have exhausted all possibilities, remember this - you haven't.”

“You have killed my love. You used to stir my imagination. Now you don't even stir my curiosity. You simply produce no effect. I loved you because you were marvelous, because you had genius and inte...”

“Intelligence minus purpose equals stupidity.”

“But spontaneity is not by any means a blind, disorderly urge, a mere power of caprice. A philosophy restricted to the alternatives of conventional language has no way of conceiving an intelligence ...”