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The anarchic nature of the international system forces states to compete for power.

創(chuàng)新源于拒絕接受限制。

We are to remember that we are not to take anything with us out of this world, and that it is how we have conducted ourselves here that will matter in the end.

The Eskimos had fifty-two names for snow because it was important to them: there ought to be as many for love.

宇宙并不比我們想象的更奇怪，而是比我們能夠想象的更奇怪。

觸摸就是記憶。

智者自知其無知。