最深刻的定理往往源于最简单的观察。
The deepest theorems often arise from the simplest observations.
A moral being is one who is capable of reflecting on his past actions and their motives.
对财产的过度关注,胜过一切其他因素,阻碍了我们自由高尚地生活。
没有我们开采的金属,能源转型就无法实现。