Certainly the difficulties of the conditions of life and the adversities of the struggle for existence may oppress us, yet even adverse external situations would not hinder the giving out of the libido; on the contrary, they may spur us on to the greatest exertions, whereby we bring our whole libido into reality. Real difficulties alone will never be able to force the libido back permanently to such a degree as to give rise, for example, to a neurosis. _The conflict, which is the condition of every neurosis, is lacking._ The resistance, which opposes its unwillingness to the will, alone has the power to produce that pathogenic introversion which is the starting point of every psychogenic disturbance. The resistance against loving produces the inability to love. Just as the normal libido is comparable to a steady stream which pours its waters broadly into the world of reality, so the resistance, dynamically considered, is comparable, not so much to a rock rearing up in the river bed which is flooded over or surrounded by the stream, as to a backward flow towards the source. A part of the soul desires the outer object; another part, however, harks back to the subjective world, where the airy and fragile palaces of phantasy beckon. One can assume the dualism of the human will for which Bleuler, from the psychiatric point of view, has coined the word “ambitendency”[343] as something generally present, bearing in mind that even the most primitive motor impulse is in opposition; as, for example, in the act of extension, the flexor muscles also become innervated. This normal ambitendency, however, never leads to an inhibition or prevention of the intended act, but is the indispensable preliminary requirement for its perfection and coördination. For a resistance disturbing to this act to arise from this harmony of finely attuned opposition an abnormal plus or minus would be needed on one or the other side. The resistance originates from this added third.[344] This applies also to the duality of the will, from which so many difficulties arise for mankind. The abnormal third frees the pair of opposites, which are normally most intimately united, and causes their manifestation in the form of separate tendencies; it is only thus that they become willingness and unwillingness, which interfere with each other. The Bhagavad-Gîtâ says, “Be thou free of the pairs of opposites.”[345] The harmony thus becomes disharmony. It cannot be my task here to investigate whence the unknown third arises, and what it is. Taken at the roots in the case of our patients, the “nuclear complex” (Freud) reveals itself as the _incest problem_. The sexual libido regressing to the parents appears as the incest tendency. The reason this path is so easily travelled is due to the enormous indolence of mankind, which will relinquish no object of the past, but will hold it fast forever. The “sacrilegious backward grasp” of which Nietzsche