可持续性不是成本，而是对我们未来的投资。

欧洲不应是怀疑者的洲，而应是行动者的洲。

Writing is making sense of life. You work your whole life and perhaps you've made sense of one small area.

The old believe everything; the middle-aged suspect everything; the young know everything.

一个奇怪的事实是，关于地球史前条件得出了完全相反的结论，这反映了我们目前知识的不完整状态。