"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."

"I have never met a man so ignorant that I couldn't learn something from him."

"Nobody minds having what is too good for them."

"Angry people are not always wise."

"It's such a happiness when good people get together."