写作是一种理解世界的方式。它是一种在混乱中强加秩序的方式。

Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job， buy the very best you can afford.

Personality can change more in your 20s than at any other time in life.

The market is a pendulum that forever swings between unsustainable optimism (which makes stocks too expensive) and unjustified pessimism (which makes them too cheap). The intelligent investor is a realist who sells to optimists and buys from pessimists.

学习计算机科学的最好方法就是去做计算机科学。