Keep your face always toward the sunshine—and shadows will fall behind you.

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.

写作就是重写。

除非定理是美丽的，否则它们毫无价值。

"The stories we tell shape our reality, but they also have the power to trap us in illusions."