It's easy to get the wrong impression about this "mirror thing". We're inclined to take the analogy literally rather than symbolically. We get no use out of it. We fail to apply what we see to reflect on how we're seeing them. We assume the mirror image means we're exactly the same as they appear to us.
When we see someone is ugly, that does not mean we're ugly too. It means we're using an ugly way of seeing them. We're not operating in a second loop where there are many ways to see what we see. It reflects on us that we would choose such an ugly approach to recognizing how they appear to us. We expect nothing to be revealed to us deeper than surface appearances. We reveal to others that we take things at face value where appearances are devoid of significance. Things don't symbolize anything to us. A fact is fact and there's no two ways about it.
When we see students as lazy, that does not signify that we're lazy in the same way. It means we're too lazy to learn more about those "lazy" students. We don't have clue why they're acting lazy, how they get provoked, tempted or forced to lack ambition. We're taking a laid back approach to inquiring, investigating or rethinking what we're seeing. We not challenging ourselves to develop a loop where there are many different ways to see appearances.
When we get the impression that a student is unimpressive, we're operating under a mistaken impression. We're too easily impressed by initial impressions. How we get impressed by others is equally unimpressive. We don't change our impressions easily or upgrade the one's we formed early on. We give off the impression that we don't expect to make much of an impression on people. We have not reflected enough on our mistaken impressions to impress people with how we see them.