应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反抗。

我们今天开采的石料，就是留给后世的遗产。

Life is full of uncertainties, and that is what makes it interesting.

For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.

The world changes by your example, not by your opinion.

"Memory is the only paradise from which we cannot be expelled."

最可持续的树是仍然屹立不倒的树。