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Richard P. Feynman Quotes about Learning

What I cannot create, I do not understand.

Quoted in James Gleick, Genius: The Life and Science of Richard Feynman (1992)

The real problem in speech is not precise language. The problem is clear language.

"New Textbooks for the "New" Mathematics". Richard P. Feynman, "Engineering and Science", Volume 28, No. 6, March 1965.