可持续发展不是一种选择，而是我们对后代的责任。

Science fiction is the literature of change.

I think the most important thing in life is to be able to look at yourself in the mirror and feel good about who you are.

现代世界的巨大挑战是创建既足够强大以有效治理，又对公民需求负责和响应的制度。