Answer: You can go astray if you start to tear yourself away from the teacher, if you begin to believe that you know the path better than him. It is impossible to know better than him because he has passed all this already.
Nothing depends on the mind. By the way, in Kabbalah, there were cases when a student turned out to be more subtle and with a sharper mind than the teacher. However, the fact is that the teacher has experience, and this is the most important thing.
In Kabbalah, the most preferred one is the one who has more experience.
From KabTV’s “Fundamentals of Kabbalah,” 3/1/20