Paper has been the carrier of human knowledge for centuries. Our duty is to ensure it continues for centuries more.
The deepest insights in mathematics often come from the most abstract theories.
这些墙很有趣,刚入狱的时候,你痛恨周围的高墙;慢慢地,你习惯了生活在其中;最终你会发现自己不得不依靠它而生存。这就叫体制化。