Some years ago I gave as an answer to the question of how one can become an analyst: ‘By analysing ones own dreams.’ This preparation is no doubt enough for many people, but not for everyone who wishes to learn analysis. Nor can everyone succeed in interpreting his own dreams without outside help. I count it as one of the many merits of the Zurich school of analysis that they have laid increased emphasis on this requirement, and have embodied it in the demand that everyone who wishes to carry out analyses on other people shall first himself undergo an analysis by someone with expert knowledge. Anyone who takes up the work seriously should choose this course, which offers more than one advantage; the sacrifice involved in laying oneself open to another person without being driven to it by illness is amply rewarded. Not only is one’s aim of learning to know what is hidden in one’s own mind far more rapidly attained and with less expense of affect, but impressions and convictions will be gained in relation to oneself which will be sought in vain from studying books and attending lectures. And lastly, we must not under-estimate the advantage to be derived from the lasting mental contact that is as a rule established between the student and his guide.
An analysis such as this of someone who is practically healthy will, as may be imagined, remain incomplete. Anyone who can appreciate the high value of the self-knowledge and increase in self-control thus acquired will, when it is over, continue the analytic examination of his personality in the form of a self-analysis, and be content to realize that, within himself as well as in the external world, he must always expect to find something new. But anyone who has scorned to take the precaution of being analysed himself will not merely be punished by being incapable of learning more than a certain amount from his patients, he will risk a more serious danger and one which may become a danger to others. He will easily fall into the temptation of projecting outwards some of the peculiarities of his own personality, which he has dimly perceived, into the field of science, as a theory having universal validity; he will bring the psychoanalytic method into discredit, and lead the inexperienced astray.
Freud, Sigmund. The Standard Edition of the Complete Psychological Works of Sigmund Freud. Vol. XII (1911-1913): The Case of Schreber, Papers on Technique, and Other Works. Trans. James Strachey. Vintage Books, London. 2001. 109-120.