真正的进步不仅仅以利润来衡量，还以我们对社会的积极影响来衡量。

最好的歌曲是那些让你感觉活着的歌。

The world is full of people whose notion of a satisfactory future is, in fact, a return to the idealised past.

我们需要犯错的自由，承认错误的勇气，以及从中学习的智慧。

The future of coal lies not in its quantity but in how cleanly and efficiently we can use it.