观其交游，则其贤不肖可察也。
观察他交往的是什么人，就能知道他的品行如何。
A word after a word after a word is power.
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.
The organism learns not only what to do but also what leads to what.
我们正从信息稀缺的时代转向信息丰富的时代，挑战不再是找到信息，而是管理信息。