Although the title essay is one of the-longer ones and quite serious in tone (dealing with Christ's basic innovation--""the idea of striking for power by organizing the poor and the power-less"") it is not really representative of the pieces here. There are six in all, five of which deal with various aspects of psychotherapy--Mr. Haley is the.director of a child guidance center and has done considerable research and writing in the field. And three of the five, ""The Art of Psychoanalysis,"" ""The Art of Being a Failure as a Therapist,"" and ""The Art of Being a Schizophrenic"" combine some diverting ploys of the art of upmanship in lying-downmanship. The last. one on the schizophrenic (is he really?) holy, terror, who sprouts initially at home to really blossom in a mental hospital where the ward psychiatrist is as unavailable as his father ever was, is the best of the lot. One assuasive essay on the amiable hippies and one more serious if harder to retain discussion of Whither Family Therapy. . . . The final impression--a genuinely funny spoof of shrink think.