The most hateful torment for men is to have knowledge of everything but power over nothing.

Quality is not a destiny; it is a design.

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.

世界充满了故事，但所有的故事都是一个。

经济史和经济发展的核心问题是解释政治和经济制度的演变，这些制度创造了一个诱导生产率提高的经济环境。