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accustomed yourselves to regard it with suspicion, to deny it the character of the scientific, to leave it to the laymen, poets, natural philosophers and mystics. Such a delimitation is surely harmful to your medical activity, for the patient will, as is usual in all human relationships, confront you first of all with his psychic facade; and I am afraid your penalty will be this, that you will be forced to relinquish a portion of the therapeutic influence to which you aspire, to those lay physicians, nature-cure fakers and mystics whom you despise.

I am not overlooking the excuse, whose existence one must admit, for this deficiency in your previous training. There is no philosophical science of therapy which could be made practicable for your medical purpose. Neither speculative philosophy nor descriptive psychology nor that so-called experimental psychology which allies itself with the physiology of the sense organs as it is taught in the schools, is in a position to teach you anything useful concerning the relation between the physical and the psychical or to put into your hand the key to the understanding of a possible disorder of the psychic functions. Within the field of medicine, psychiatry does, it is true, occupy itself with the description of the observed psychic disorders and with their grouping into clinical symptom-pictures; but in their better hours the psychiatrists themselves doubt whether their purely descriptive account deserves the name of a science. The symptoms which constitute these clinical pictures are known neither in their origin, in their mechanism, nor in their mutual relationship. There are either no discoverable corresponding changes of the anatomical organ of the soul, or else the changes are of such a nature as to yield no enlightenment. Such psychic disturbances are open to therapeutic influence only when they can be identified as secondary phenomena of an otherwise organic affection.

Here is the gap which psychoanalysis aims to fill. It prepares to give psychiatry the omitted psychological foundation, it hopes to reveal the common basis from which, as a starting point, constant correlation of bodily and psychic disturbances becomes comprehensible. To this end, it must divorce itself from every anatomical, chemical or physiological supposition which is alien to it. It must work throughout with purely psychological