We are not destroyed by what we hate， but by what we love.

The past is a shadow that follows us, a ghost that haunts us.

States are inherently aggressive and expansionist because they exist in an anarchic international system where there is no higher authority to keep them in check.

Optimism is a strategy for making a better future. Because unless you believe that the future can be better, you are unlikely to step up and take responsibility for making it so.

在科学中，失败不是成功的对立面，而是通向成功的垫脚石。

"A good film is one that leaves the audience with more questions than answers."