In this chapter, the author stresses Sigmund Freud's point that certain 'natural talents and character traits' are indispensable in the psychoanalytic therapist, and emphasises his recognition that some of his hypotheses will be revised in time—his theories are not 'revelations which may not be disputed'. By means of this outline of psycho-analytic technique which constitutes the main part of the book, Professor Freud ultimately makes clear that his own advocacy for the existence of duly trained and registered non-medical analysts is firmly founded on the realities of the problem, uninfluenced by prepossessions or irrelevant considerations. The theory of psychoanalysis is no easy matter to assimilate, the technique far from easy to acquire. The actual conditions inherent in the nature of the therapy therefore require a careful procedure of selection and thorough training of practitioners, in order to ensure that only the competent shall be entitled to practise this exigent scientific art.