For Professor Horton Davies, Weatherhead was "unrivalled as a twentieth-century physician of souls and preacher of the integration of personality through Christ". Professor Larsen, while agreeing that Weatherhead was "a brilliant preacher", judges his sermons, however, to be theologically "vacuous and empty". Weatherhead, he writes, was perhaps the most striking example in the British Isles of "the increasing horizontalization and psychologization of the sermon", a tendency wittily characterised by E. Brooks Holifield as "From Salvation to Self-Realization". Weatherhead's scorn for theology—he claimed that poets had more insight than theologians—and penchant for "preaching as psychotherapy" made him, in Larsen's view, "a tragic instance in which psychical research replaced 'sound doctrine'". Even his psychology, which drew on fringe thinkers as well as more mainstream figures like Freud, is now "severely dated. No one today talks about Odic force and the leakage of psychic energy. His 55 books are virtually unread today."