要理解现在，必须先理解过去。

The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum.

The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.

Environmental protection is our inescapable responsibility. We must pay attention to ecological protection in the mining process to achieve sustainable development.

我们手里的金钱是保持自由的一种工具；我们所追求的金钱，则是使自己当奴隶的一种工具。

我相信要直面挑战，而不是回避它们。

I need the sea because it teaches me.

过去总是与我们同在，因为它滋养着现在。