The fact that a certain proposition can be deduced from a certain set of axioms by means of a certain system of rules does not in itself make it true.
某个命题可以从某一组公理通过某一规则系统推导出来，这一事实本身并不使其为真。
I'm a perfectionist, and I'm pretty tough on myself.
Everything is possible as long as you have the courage to pursue it.
翻译：所以不完全了解用兵的危害，就不能完全了解用兵的好处。