"I was a little bit of a maverick."

"Scientific knowledge is a body of statements of varying degrees of certainty—some most unsure, some nearly sure, but none absolutely certain."

"I'm not a popularizer. I'm not trying to tell the public what to think. I'm just telling them what I think."

"The greatest joy is to understand how nature works."

"When you are a scientist, you are a member of a community of people who are trying to find out the truth."