The design of a system should be guided by the principle of least surprise, where the behavior of components is intuitive and predictable.

War is an ugly thing， but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth a war， is much worse.

诗歌是心灵的语言。

"The books that help you most are those which make you think the most."

Being brave isn’t the absence of fear. Being brave is having that fear but finding a way through it.

煤炭的真实成本必须既考虑其即时价值，也考虑其对社区和生态系统的长期影响。