For nearly a half century, the major part of his professional life, Frederick Perls was in conflict with the psychiatric and psychological establishments. He worked uncompromisingly in his own direction, which often involved fights with representatives of more conventional views. In the past few years, however, Perls and his Gestalt therapy have come to find harmony with an increasingly large segment of mental health theory and professional practice. The change that has taken place is not because Perls has modified his position, although his work has undergone some transformation, but because the trends and concepts of the field have moved closer to him and his work. Perls's own conflict with the existing order contains the seeds of his change theory. He did not explicitly delineate this change theory, but it underlies much of his work and is implied in the practice of Gestalt techniques. I will call it the paradoxical theory of change, for reasons that shall become obvious. Briefly stated, it is this: that change occurs when one becomes what he is, not when he tries to become what he is not. Change does not take place through a coercive attempt by the individual or by another person to change him, but it does take place if one takes the time and effort to be what he is --to be fully invested in his current positions. By rejecting the role of change agent, we make meaningful and orderly change possible.