可持续性不再是选择，而是我们对后代的责任。

The human being cannot live in a condition of emptiness for very long: if he is not growing toward something, he does not merely stagnate; the pent-up potentialities turn into morbidity and despair, and eventually into destructive activities.

You can't go home again.

永远不要停止学习；一旦停止，你就会开始落后。

聪明的人遇上事，话到口边会留半句；大彻大悟的人遇上事，甚至一句话都不说。