我必须研究政治和战争，以便我的儿子们可以自由地研究数学和哲学。
"Writing is a way of thinking with the fingers."
Sustainable forestry isn't a cost—it's an investment in our future.
You can't control what you don't measure.
I'm not a bad guy, I'm just a guy who sometimes does bad things.
我了解到失败不是成功的对立面，而是成功的一部分。