Sustainability isn't a trend; it's a responsibility we owe to future generations.

I don't need a reason to be confident in my choices.

词汇不仅仅是声音或符号，而是事实的标志。

The best legacy we can leave is a living one.

实现明天的唯一限制是我们今天的疑虑。

Liberal democracy may constitute the "end point of mankind's ideological evolution" and the "final form of human government."

我认为不断挑战自己，不断成长是很重要的。