"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."

"You can't be unhappy when you are holding a cup of tea."

"Rise to the occassion which is life!"

"The trick is to enjoy life. Don't wish away your days, waiting for better ones ahead."

"I am not good at noticing when I'm happy, except in retrospect."