four types of men

There are four types of men:

A man that knows, but does not know that he knows;
That one is negligent, so remind him.

A man that does not know, and does not know that he does not know;
That one is foolish, so abandon him.

A man that does not know, and knows that he does not know;
That one is ignorant, so teach him.

A man that knows, and knows that he knows;
That man is a knower, so follow him.

By: Al Khalil ibn ahmad al Farahidi