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The divine right of husbands, like the divine right of kings, may, it is hoped, in this enlightened age, be contested without danger.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

數學的美在于它讓我們以一種既精確又深刻的方式看待世界，揭示支配萬物的潛在秩序。

風險來自于不知道自己在做什么。