实现明天理想的唯一障碍是今天的疑虑。

There's a tendency to think that our present politicians are much worse than we had in the past.But we tend to forget how awful our politicians were in the past.

一个人的首要职责是为自己思考。

仅靠政策无法拯救我们的森林——需要个人、企业和政府采取行动。