"My father used to say that the only way to learn something is to make mistakes, and then learn from them."

"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

"Before I came here I was not only a little confused about the subject, but also had some doubts about my confusion."

"When asked what characteristics Nobel prize winning physicists had in common I cannot think of a single one not even intelligence."

"I would rather be ignorant and learn, than be learned and not know."