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The greatest use of life is to spend it for something that will outlast it.

My motto has always been: A career open to all talents, without distinctions of birth.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

數學推理可以相當系統地看作是對兩種能力的結合運用，我們可以稱之為直覺和獨創性。

我們不是從祖先那里繼承地球，而是從子孫那里借來的。讓我們把它變得更好。