I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

I can never be safe; I always try and go against the grain. As soon as I accomplish one thing, I just set a higher goal. That’s how I’ve gotten to where I am.

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。

Le ciel est, par-dessus le toit, / Si bleu, si calme!

We live in a world where everything is for sale, including our souls.

Certification schemes are the floor, not the ceiling of responsible forestry practice.

The only thing that separates us from the animals is our ability to accessorize.

宁可做一个不满足的人，也不愿做一个满足的猪；宁可做苏格拉底不满足，也不愿做一个愚蠢的满足者。