"There's nothing more exciting than science. You get all the fun of sitting still, being quiet, writing down numbers, paying attention. Science has it all."

"Politeness is half good manners and half good lying."

"Forsake not an old friend; for the new is not comparable to him: a new friend is as new wine; when it is old, thou shalt drink it with pleasure."

"In America, anyone can become president. That's one of the risks you take."

"It has been my fate, and one's fate one accepts. It's a dreadful thing to have to say, in so wicked a world."

"We are born believing. A man bears beliefs, as a tree bears apples."

"How to make God laugh: Tell him your future plans."

"The world is round and the place which may seem like the end may also be only the beginning."

"Self-trust is the essence of heroism"

"But in our enthusiasm, we could not resist a radical overhaul of the system, in which all of its major weaknesses have been exposed, analyzed, and replaced with new weaknesses."