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

Without models, we would be wandering in the dark when it comes to predicting climate change.

To be a poet is to have a soul so quick to discern, that no shade of quality escapes it.

The dead have much to teach the living.

The greatest theorems often arise from questioning the obvious.

你要成为自己的太阳，你的世界将因你而明亮。

我们地球的过去历史必须通过现在可以看到的现象来解释。