ABSTRACT
Medical psychology differs from other branches of the subject in that it has taken a very important step in crossing the boundary of normal consciousness and entering a new field, which it calls the “unconscious”. S. Freud investigated factors in the human personality which lie beyond the conscious threshold. The psycho-analytical branch of psychology arose out of a practical technique; but the fact that it had strayed across the conscious boundary, away from the checks provided by the sensory controls of the external world, had the strange effect of turning it into a cult rather than a science. The claims of psycho-analytical psychology would be quite valid, as also would be the claims of the Behaviourists, if kept within their proper bounds. The adapted mind of Homo faber permeates psychology as it permeates the other sciences; in fact, it permeates all our intellectual activities just as it permeates our daily life.
