There are certain things that we cannot make ourselves believe， no matter how hard we try.
有些事情，无论我们多么努力，都无法使自己相信。
当你相信它时，你就会看到它。
The only thing worse than training employees and losing them is not training them and keeping them.
To combat an adversary， become their friend.
在数学中，你并不理解事物。你只是习惯了它们。