And in this respect, the one thing which reveals this knowledge is history. But people do not live alone, they live in society. And it is in society that the individual comes into contact with other individuals, all of whom are on the same quest, in varying degrees. So, for Socrates, knowledge of self does not hinge upon reflection or introspection, but conversation, hence the Socratic dialogue. The Socratic dialogue implies that instructor and student meet on an equal footing.
Dialogue means conversation between two or more people.
Well, for me it's a form of selfishness. I wish to improve myself. And by improving myself I also improve others. This classical pedagogical method is called the Socratic method. If your instructor isn't at least familiar with it, then I'm afraid your historical education is going to suffer as a result.