"When we know why, we know what to do."

"I don't believe in miracles, because I believe in science."

"I feel that if a man has a problem, it's not solved unless he understands it."

"You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like what they expect me to be. It's their mistake, not my failing."

"When I was in high school, I'd read about the great scientists and I was ashamed that I was not a great scientist. I used to think, 'What's the matter with me? I'm not a great scientist.'"