应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
Language is a skin: I rub my language against the other. It is as if I had words instead of fingers, or fingers at the tip of my words.
定义就是限制。
The most important questions in life often have no answers, and we must learn to live with them.
"The worst enemy of truth is not the lie—deliberate, contrived, and dishonest—but the myth—persistent, persuasive, and unrealistic."
数学是一种超越文化和语言障碍的通用语言。