A man is known by the company he keeps.是什么意思？

A man is known by the company he keeps.

一个人从他所交的朋友，就可以看出他的为人。

A man may usually be known by the Books he reads as well as by the company he keeps; for there is a companionship of Books as well as of men; and one should always live in the Best company,whether it be of Books or of men.

看一个人读些什么书就可知道他的为人,就像看一个同什么人交往就可知道他的为人一样。因为世界上有人的伴侣,也有书的伴侣。无论是书友或朋友,我们都应该择其最佳者而从之。