Richard P. Feynman
181 citations

We cannot define anything precisely. If we attempt to, we get into the paralysis of thought that comes to philosophers, who sit opposite each other, one saying to the other, You don't know what you are talking about! The second one says, What do you mean by know? What do you mean by talking? What do you mean by you? ✨ The Feynman Lectures on Physics (volume I; lecture 8: Motion). Book by Richard P. Feynman, Robert B. Leighton and Matthew Sands, 1964.

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