人生没有捷径，只有脚踏实地。

Sustainability isn't an option; it's a necessity for the future of our planet.

Psychology must be a science of description, not explanation.

I used to think the world was broken down by tribes. Then I thought it was broken down by rich and poor. Then I thought it was broken down by stupid and smart. But I know now that it is broken down by people who are alive and people who are dead.