There is a proverb to the effect that to him that is well shod the whole earth is covered with leather. And so the mathematician may walk where he pleases. What particular path he chooses is not a matter of great importance, but it is important that he be abroad and doing, and that he do not sit at home admiring his shoes.

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Attribution

Quote text and notes from Wikiquote: Frank Schlesinger (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.