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"The truth is rarely pure and never simple."

我并不假裝理解宇宙——它比我大多了。

沒有反省的人生不值得活。

The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.

The best way to learn mathematics is to do mathematics.

勇氣是能站起來侃侃而談。勇氣也是能坐下來靜靜傾聽。