"The truth is rarely pure and never simple."

英语中最美的词是"我告诉过你"。

写作是理解我们在历史中位置的一种方式。

The unsaid things are often the most important.

The only person you should try to be better than is the person you were yesterday.

《三民主义.民生主义》（1924年8月10日）

理解计算的极限与理解数学的极限同样重要。