The mind is everything; what you think, you become.

数学中真正的挑战不是解决问题，而是提出正确的问题。

外部世界的旅程可能有一百万步;内心世界的旅程只有一步:当下正在迈出的这一步。

Profit without purpose is empty; purpose without profit is unsustainable.

The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.

We are all of us, every day, engaged in the act of creating ourselves.

In the exploration of science, we must not only ask why but also why not.

技术没有善恶，关键在于如何使用。

The legacy of the coal industry will be defined by what we do today.