detect in their own minds the exact opposite of such a wish as is interpreted to them, and when they can prove to us by their whole conduct in life that the contrary desire predominates, surely we must be nonplussed. Is it not about time now for us to discard our whole work of dream-interpretation as something which has led to a _reductio ad absurdum_? No, not even now. Even this stronger argument falls to pieces when subjected to a critical attack. Assuming that unconscious tendencies do exist in mental life, the fact that the opposite tendencies predominate in conscious life goes to prove nothing. Perhaps there is room in the mind for opposite tendencies, for contradictions, existing side by side; indeed, possibly the very predominance of the one tendency conditions the unconscious nature of the opposite. So the first objections raised only amount to the statement that the results of dream-interpretation are not simple and are very disagreeable. To the first charge we may reply that, however much enamoured of simplicity you may be, you cannot thereby solve one of the problems of dreams; you have to make up your mind at the outset to accept the fact of complicated relations. And, as regards the second point, you are manifestly wrong in taking the fact that something pleases or repels yourself as the motive for a scientific judgement. What does it matter if you do find the results of dream-interpretation unpleasant, or even mortifying and repulsive? _Ça n’empêche pas d’exister_—as I, when a young doctor, heard my chief, Charcot, say in a similar case. We must be humble and put sympathies and antipathies honourably in the background if we would learn to know reality in this world. If a physicist could prove to you that organic life on the earth was bound to become extinct before long, would you venture to say to him also: “That cannot be so; I dislike the prospect too much.” I think you would say nothing, until another physicist came along and convicted the first of a mistake in his premises or his calculations. If you repudiate whatever is distasteful to you, you are repeating the mechanism of a dream structure rather than understanding and mastering it.