In this article the author expounds the work of Dr. Milton H. Erickson, a well-known medical hypnotist. The word 'control' in the title refers to the therapist-hypnotist getting the upper hand in a situation with the patient. This is done, with or without hypnotism, by undermining the patient's resistance in various ways. Primarily it involves going along with the patient's resistance (such as withholding material) in order to make that very resistance seem to be under the control of the therapist. Techniques of manipulative psychotherapy, using 'interpersonal theory' and avoiding any intrapsychic conflict, transference interpretations, and delving into the past are described. Unfortunately, it is implied that emotional difficulties are better explained by interpersonal than by intrapsychic considerations.