He was a critic of contemporary psychoanalysis, believing it to be rigid and formulaic. He believed that the ideal of rationality proposed by modern psychiatry alienated the adult from his or her creative inner processes. His work with dream analysis stressed the positive aspects of imagination, and thought imagination could be beneficial to psychic development. In 1968 he resigned from the British Psychoanalytical Society, feeling that "the real power in the Society belonged to people of whose values I did not approve...their ways of conducting business and engaging in controversy were entirely alien to me".