观其外知其内，观其友知其人一个没有好朋友，就不会看到自己的缺点。
View outside its its, view man is known by the company he keeps a good friends, no you don't see your faults.
所谓欲知其人，先观其友，看一个人读什么书也能了解一个人，因人不仅能与人为友，还能与书为友。
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.
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