文明被描述为对一系列挑战的回应结果，而其中最大的挑战始终是气候。

It is much easier to change how you think by changing your behavior， than it is to change your behavior by changing how you think. Act out the change you seek.

真正的天堂是我们已经失去的天堂。

Change the way you look at things and the things you look at change.