It said that men are of four ; a man of knowledge and he realizes he is, this is a schooler to be followed.And a man of knowledge but he doesn`t realize that he is ,this one is a slept whom you should awake . And a man does’t know any thing and realizes that he doesn`t; this one is a learner whom you should teach .And a man doesn`t know any thing and does not realiz that he doesn`t , this man is an ignorant whom you should reject .