善可以存在于没有恶的情况下，而恶无法在没有善的情况下存在。
Good can exist without evil， whereas evil cannot exist without good.
"To live is the rarest thing in the world. Most people exist, that is all."
The great powers are always searching for opportunities to gain power at the expense of their rivals, which makes them inherently aggressive.
现实总是比小说更丰富、更复杂。
对人类来说，最可恨的事情是知道一切却无能为力。
预测未来的最好方法就是创造未来。