Mathematics is a creative endeavor, just like art or music.
To be, or not to be… that is the question.
You build your life around what you fear, and then you spend your life being afraid.
渔民是我们的伙伴,他们的利益必须放在首位。
Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.