如果战略达到了目标，它就是有用的；如果战略实现了目标，它就是成功的。

I write to understand what cannot be understood.

I'm not a talk, I'm a song.

The very existence of libraries affords the best evidence that we may yet have hope for the future of man.

The ultimate test of any economic theory is whether it improves real-world decisions.

最好的采石场不仅在地面上留下洞，还在社区中留下价值。