It pleases me greatly to see you here again to continue our discussions after a year has passed. Last year the subject of my lectures was the application of psycho-analysis to errors and to dreams; I hope this year to lead you to some comprehension of neurotic phenomena which, as you will soon discover, have much in common with both our former subjects. I must tell you before I begin, however, that I cannot concede you the same attitude towards me now as I did last year. Then I endeavoured to make no step without being in agreement with your judgement; I debated a great deal with you, submitted to your objections, in fact, recognized you and your “healthy common-sense” as the deciding factor. That is no longer possible and for a very simple reason. Errors and dreams are phenomena which were familiar to you; one might say you had as much experience of them as I, or could easily have obtained it. The manifestations of neurosis, however, are an unknown region to you; those of you who are not yourselves medical men have no access there except through the accounts I give you; and of what use is the most excellent judgement where there is no knowledge of the subject under debate? However, do not receive this announcement as though I were going to give these lectures _ex cathedra_ or to demand unconditional acceptance from you. Any such misconception would do me a gross injustice. I do not aim at producing conviction,—my aim is to stimulate enquiry and to destroy prejudices. If owing to ignorance of the subject you are not in a position to adjudicate, then you should neither believe nor reject. You should only listen and allow what I tell you to make its own effect upon you. Convictions are not so easily acquired, or, when they are achieved without much trouble, they soon prove worthless and unstable. No one has a right to conviction on these matters who has not worked at this subject for many years, as I have, and has not himself experienced the same new and astonishing discoveries. Then why these sudden convictions in intellectual matters, lightning conversions, and instantaneous repudiations? Do you not see that the _coup de foudre_, “love at first sight,” proceeds from a very different mental sphere, from the affective one? We do not require even our patients to bring with them any conviction in favour of psycho-analysis or any devotion to it. It would make us suspicious of them. Benevolent scepticism is the attitude in them which we like best. Therefore will you also try to let psycho-analytical conceptions develop quietly in your minds alongside the popular or the psychiatric view, until opportunities arise for them to influence each other and be united into a decisive opinion.