This revised, updated, and expanded edition of a classic primer of countertransference and counterresistance reflects changes in contemporary psychotherapy and new situations that face therapists. The clinical blunders, chosen to convey the interpsychic, intrapsychic, and human aspect of the therapeutic dyad, illustrate a variety of dilemmas in an accessible form, and they now also address how supervisors react to their own countertransferences. Countertransference and counterresistance are universal, and this edition, like its predecessor, makes an absolute case for therapists to undergo a real, personal analysis. The 101 examples of therapeutic blunders and 11 supervisory blunders are presented simply, dramatically and often humorously, so that therapists of all persuasions can understand them.