Sustainability must be at the core of every stone we extract, or we extract nothing at all.

People who treat other people as less than human must not be surprised when the bread they have cast on the waters comes floating back to them, poisoned.

The world is what it is; men who are nothing, who allow themselves to become nothing, have no place in it.

Success is a journey, not a destination.

Your  biggest  competior is yourself.

对我们森林最大的威胁不是伐木，而是漠不关心。