"Think for yourself while being radically open-minded."

"Success comes from knowing what you don't know more than from knowing what you do know."

"Pain plus reflection equals progress."

"Mistakes are acceptable if you learn from them; unacceptable if you don't."

"Knowing how to deal well with not knowing is far more important than knowing."

"People who worry about looking good typically hide what they don't know, and people who are more concerned with achieving goals expose what they don't know."