人只有在行动中才能找到自己。
Man finds himself only in action.
"We are all fools in love."
The beauty of mathematics lies in its ability to connect seemingly unrelated ideas.
现实的织物是由数学和观察的线编织而成的。
——1920年1月为《大光报》年刊题词
Every discovery in science is built upon the work of countless others before us.
书籍是理解我们自己的钥匙。