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Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.

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[The golden proportion] is a scale of proportions which makes the bad difficult [to produce] and the good easy.

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Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

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One must divide one's time between politics and equations. But our equations are much more important to me, because politics is for the present, while...more

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For an idea that does not first seem insane, there is no hope.

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The ideals which have always shone before me and filled me with joy are goodness, beauty, and truth.

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God always takes the simplest way.