"I'm a great believer in the idea that if you don't understand something, you should try to explain it to someone else."

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled."

"I have no responsibility to be like what other people expect me to be. It's their mistake, not my failing."

"I was brought up to believe that the only way to really understand something is to build it."

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