"Adapt or perish, now as ever, is nature's inexorable imperative."

"Religion is pickled God."

"Human history becomes more and more a race between education and catastrophe."

"When I see an adult on a bicycle, I do not despair for the future of the human race."

"No passion in the world is equal to the passion to alter someone else's draft."

"Strength is the outcome of need."

"Blessed are the forgetful for they get the better even of their blunders."

"He who undervalues himself is justly undervalued by others."

"Curiosity is the very basis of education and if you tell me that curiosity killed the cat, I say only the cat died nobly."

"I'm going to memorize your name and throw my head away."

"My kittens look at me like little angels, and always after doing something especially devilish."

"I think God is as much a basic ingredient in the universe as neutrons and positrons. This is the prime force, when we look around the universe."