"A thousand years ago, everybody knew the Earth was the center of the universe. Five hundred years ago, they knew the Earth was flat. Fifteen minutes ago, you knew we humans were alone on it. Imagine what you'll know tomorrow."

"A little knowledge is a dangerous thing. Drink deep, or taste not the Pierian spring."

"Think left and think right and think low and think high. Oh, the thinks you can think up if only you try!"

"Cheating on a good woman is like choosing trash over treasure."

"Work as hard as you can, whatever you do, and try to spread generosity of spirit."

"Only you can control your future."