The true measure of success in forestry is leaving the land healthier than we found it.
译文：读书人既然知道学习的重要性，就怕做学问没有一颗恒心，人不怕贫穷，就怕人穷志也穷。赏析：读书最怕浅尝辄止，一知半解。知识如大海一般没有尽头，我们要有坚持不懈的定力，方能学到真本领。我们身处困境，不能丧失斗志，在哪里跌倒就在哪里爬起。
To write is to resist the erasure of memory.
What we gain by experience is more real and more solid than what we gain by reasoning.