True competitive advantage comes from doing what others aren't willing to do.

States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.

The poem is a way of holding on to what otherwise would be lost.

沉默从来不是空的；它充满了可能性。

你无法改变过去，但可以改变未来。

略知一点哲学可能使人倾向于无神论，但深刻的哲学可能使人回归到宗教。

我不是一个喜欢回头看的人，我总是向前看。

数学是所有科学建立的基础。