The true measure of success in forestry is leaving the land healthier than we found it.

Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

I believe in the power of love to change the world.

我认为这是最好的建议：不断思考如何做得更好，并质疑自己。