To one who has faith, no explanation is necessary. To one without faith, no explanation is possible.

A well-designed system should be easy to use, easy to understand, and easy to modify.

The only thing standing between you and your goal is the story you keep telling yourself as to why you can't achieve it.

最可持续的森林是当地社区既有利益又有发言权的森林。

We are all responsible for the world we have created, and therefore we must work together to change it.

不必信仰相同的正式宗教——只需共同追求真理。

儿童有着他自己的人格，他自身具有创造精神的美和尊严。这种美和尊严是永远不能磨灭的，所以他的纯洁而非常敏感的心灵需要我们最审慎的爱护。