People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.

大军过境，草木皆焚。

可持续的森林是既能支持野生动物又能维持生计的森林。

数学之美在于它的简洁与深度。