Richard Feynman: The Feynman Lectures on Physics

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We cannot define anything precisely! If we attempt to, we get into that 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?", and so on.

Volume 1, Chapter 8-1

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Poets say science takes away from the beauty of the stars - mere globs of gas atoms. Nothing is "mere." I too can see the stars on a desert night, and feel them. But do I see less or more? The vastness of the heavens stretches my imagination - stuck on this carousel my little eye can catch one-million-year-old light. A vast pattern - of which I am a part - perhaps my stuff was belched from some forgotten star, as one is belching there. Or see them with the greater eye of Palomar, rushing all apart from some common starting point when they were perhaps all together. What is the pattern, or the meaning, or the why? It does not do harm to the mystery to know a little about it. For far more marvelous is the truth than any artists of the past imagined!

Volume 1, Chapter 3-4 (footnote)

The "paradox" is only a conflict between reality and your feeling of what reality "ought to be".

Volume 3, Chapter 18-3

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