年轻时你以为会有很多朋友。但随着年龄增长，你意识到一只手就能数得过来。

Efficiency without sustainability is just a short-term win; true progress is measured in long-term impact.

A good abstraction is one that emphasizes the essential and suppresses the irrelevant.

夜晚觉察到早晨的错误，今日悔恨昨日的过失。