真正的领导力是为他人服务，而不是命令他们。

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

Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

最深刻的真理往往存在于最简单的时刻。