Thought is the servant of action, and action is the servant of survival.

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。

可持续性不是一种趋势，而是我们对后代的责任。

You forget what you want to remember, and you remember what you want to forget.

The primary cause of unhappiness is never thesituation but your thoughts about it.

最好的建筑往往来自限制条件。