First when you have not made an effort to learn, then the illusion that you have mastery is neither good religion nor good Science. When you don't appreciate mastery and don't understand what it takes and that there is reward, then you can have the illusion of progress without effort. That is one end of the bad spectrum, and you can become a clueless teacher. When your Psalms teacher makes every Psalm in the Bible sound the same you do not have a teacher at all but a deluded layperson who will prevent you from learning. They don't know anything, but they believe they know the limits of what can be learned. Thus you, the student, are stuck in an Escher painting. I think there is a parallel in research where there are groups of peers who believe in Economic theories and won't acknowledge the validity of other models. It happens in the Humanities, too. So if you as a student learn one point of view and get the impression that you have mastery then what you have is someone's model and not mastery. If one model is your idea of mastery then you become a clueless teacher who can only learn and only teach one thing.
