If we treat the ocean as a limitless resource, we will soon find it is anything but.

The dead are not powerless. Dead, did I say? There is no death, only a change of worlds.

Magic, like any other power, is neither good nor evil in itself. It is the purpose to which it is put that determines its nature.

不了解敌情，不可以行军打仗，不熟悉洋人的情况，不可以远谋。

数学的快乐来自于复杂事物变得简单的清晰时刻。