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.

唯一真正的智慧是知道你一无所知。

Life is about growth and change. When you stop growing, you stop living.

“唯一真正属于你的是你的时间。”

一个在真正饥饿时被喂食、在疲倦时被允许睡觉的婴儿会是一个满足的婴儿。