All wisdom is rooted in learning to call things by the right name. When things are properly identified, they fall into natural categories and understanding becomes orderly.
There are three friendships which are advantageous, and three which are injurious. Friendship with the upright; friendship with the sincere; and friendship with the man of much observation: these are advantageous. Friendship with the man of specious airs; friendship with the insinuatingly soft; and friendship with the glib-tongued: these are injurious.
Sincerity becomes apparent. From being apparent, it becomes manifest. From being manifest, it becomes brilliant. Brilliant, it affects others. Affecting others, they are changed by it. Changed by it, they are transformed. It is only he who is possessed of the most complete sincerity that can exist under heaven, who can transform.
To know, is to know that you know nothing. That is the meaning of true knowledge. When you say something, say what you know. When you don't know something, say you don't know. That is knowledge.
The Superior Man has nothing to compete for. But if he must compete, he does it in an archery match, wherein he ascends to his position, bowing in deference. Descending, he drinks the ritual cup.