One of the things Israel Regardie has written is that all students of magick should get into some form of psychotherapy. Of course, this is supposed to help the student not become ego-inflated. However, there was another reason for this. Regardie told me that working with a therapist would convince students of the reality of the unconscious mind.
Today, most people accept the concept that we have both conscious and unconscious minds (or at least conscious and unconscious aspects of our mind). But when Regardie started on his magickal career at the beginning of the last century, many did not believe this. It was only with Freud that the idea became accepted, and that acceptance did not