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We thought we had such problems. How were we to know we were happy?

人對意義的追尋是他生命中的主要動機。

The most important questions of life are, for the most part, really only problems of probability.

證明的優雅與其正確性同樣重要。

秩序和簡化是掌握一門學科的第一步。

Where I am, I don't know, I'll never know, in the silence you don't know, you must go on, I can't go on, I'll go on.