With this aim in view, Freud from then on ceased to hypnotize his patients and substituted for that method, "spontaneous ideas." This means that when the analysis of a patient who is awake is obstructed, and has come to a dead stop, he is told to communicate anything which comes into his mind, no matter what idea, what thought, even if the thing were very queer to him or seemed meaningless. In the material thus obtained the thread should be found leading to the semi-forgotten, the thing hidden in the consciousness. In single cases--where the resistance toward bringing into consciousness the forgotten or repressed thing, the complex, was slight--this method of treatment very quickly attains its end, but in others where the resistance was greater, the spontaneous ideas merely brought about indirect representations, mere allusions as it were to the forgotten element. Here favorable results either were not so readily obtained, or else were entirely lacking. In conjunction with this, Freud planned a simple method of interpretation by means of which, from the material thus obtained, the repressed complexes could be brought to consciousness. Independently of Freud, the Zurich school (Bleuler, Jung) had planned the association method in order to penetrate into the patient's subconsciousness. The value of this method is chiefly a theoretical experimental one; it leads to an orientation of large circumference, but necessarily superficial in regard to the subconscious conflict (complex). Freud compares its importance for the psychoanalyticus; with the importance of the qualitative analysis for the chemist. Not being completely satisfied with his method of spontaneous ideas Freud sought shorter paths to the subconscious, and therefore undertook the study of the dream-life (dealing with forgetfulness, speaking to one's self, making mistakes, giving offense to one's self, and with superstition and absent-mindedness, and the study of word quibbles taken in their widest sense), to all of which we are indebted for the possession of his three important books: "Die Traumdeutung?" (First edition 1900, third edition 1912); "Zur Psychopathologie des Alltagslebens" (1901-1907); "Der Witz und seine Bedeutung zum Unbewussten" (1905). Because of the discovery of the repressed and the forbidden in the soul life, the instructions contained in the three last-named works are of great importance and of help to us in the study of the spontaneous ideas of the patient brought to light by free association. But what is of more importance for analysis is the study of what may well be termed Freud's masterpiece, "Die Traumdeutung." Jung expresses himself as follows in regard to Freud's ingenious discovery.