The more you live, the more you learn. The more you learn, the more you realize how little you know.

Tolerance becomes a crime when applied to evil.

采矿业的未来在于技术和可持续实践。

经济学的第一课是稀缺：从来没有足够的任何一种东西能够满足所有人对其需要。政治学的第一课是摒弃经济学的第一课。

The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

"The hawk was a mirror in which I saw myself reflected."

我们必须接受失望，因为它是有限的，但千万不可失去希望，因为它是无限的。