生命短暂，让它甜美。

出自汉·桓宽《盐铁论·未通》。修筑城墙的人，首先要加厚城墙的地基，然后再把城墙垒高；善于养民的人，首先要巩固人民的产业，然后才能使他们走向富裕。要使人民实现富裕，首先要使人民有稳定的工作。国家应该合理地配置土地资源，使农民有地可耕；还应该整治社会治安，稳定市场秩序，沟通贸易渠道，使商人有买卖可做。只有做好了这些基本工作，人民才能逐渐走向富裕。

实现明天的唯一限制将是我们今天的疑虑。

The best designs come from understanding natural laws.

钓鱼的人躬着身子，不是要对鱼恭恭敬敬；用虫子作为诱饵捕鼠，也不是因为喜爱老鼠。

There is no easy walk to freedom anywhere, and many of us will have to pass through the valley of the shadow of death again and again before we reach the mountaintop of our desires.

A philosophical problem has the form: "I don't know my way about."

Much of what sophisticates loftily refer to as the "complexity of the real world” is in fact the inconsistency in their own minds.