4 kinds of people

Al-Khalil ibn Ahmad said:

Men are of four categories [i] A man who knows and knows that he knows: this man is a learned man, so follow him [ii] A man who knows but is not aware that he knows: this is a man asleep so awaken him; [iii] A man who does not know and knows that he does not know; this is a seeker of guidance, so guide him; [iv] A man who does not know and is unaware that he does not know: this is a ignorant man so reject him