The deepest insights in mathematics often come from the most abstract theories.
数学中最深刻的见解往往来自最抽象的理论。
关上门。写作时不要让别人看着你的肩膀。不要试图弄清楚别人想从你这里听到什么;弄清楚你要说什么。这是你唯一能提供的东西。
Materials have memory; they carry time and stories.