1. The man who knows and he knows that he knows:

This is the Scholar, so follow him.

2. The man who knows but he does not know that he knows:

This is the Forgetful One, so wake him.

3. The man who does not know, and he knows that he does not know:

This is the Seeker, so guide him.

4. The man who does not know, but he does not know that he does not know:

This is the Ignoramus, so leave him.