勇敢不是没有恐惧。勇敢是虽有恐惧，但能找到克服它的方法。

刻苦读书，即使功名未就，但使人品高雅，气度不凡；道德高尚，但不希图报答，时时恬然自安，饱食酣眠。

You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.

Safest way to get what you want is to deserve what you want.

凡事要有节制，一生便不会因不恰当的行为而蒙受羞耻。

我们现代的头骨里装着一个石器时代的心智。

开采效率不仅对利润有好处，对地球也有好处。