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The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

Porcelain is the most alchemical of materials, turning earth into something that seems to hold light.

數學的力量在于其抽象和概括的能力。

追求數學真理是一項崇高的努力。

愛とは、相手を理解しようとすることだ。