However, we experience the desire to modify Spencer’s thought; to give a more definite meaning to some of the ideas and to change others. We would say that laughter arises when the sum total of psychic energy, formerly used for the occupation of certain psychic channels, has become unutilizable so that it can experience absolute discharge. We know what criticism such a declaration invites, but for our defense we dare cite a pertinent quotation from Lipps’s treatise on _Komik und Humor_, an analysis which throws light on other problems besides the comic and humor. He says: “In the end individual psychological problems always lead us fairly deeply into psychology, so that fundamentally no psychological problem may be considered by itself” (p. 71). The terms “psychic energy,” “discharge,” and the treatment of psychic energy as a quantity have become habitual modes of thinking since I began to explain to myself the fact of psychopathology philosophically. Being of the same opinion as Lipps I have essayed to represent in my _Interpretation of Dreams_ the unconscious psychic processes as real entities, and I have not represented the conscious contents as the “real psychic activity.”[54] Only when I speak about the “investing energy (_Besetzung_) of psychic channels,” do I seem to deviate from the analogies that Lipps uses. The knowledge that I have gained about the fact that psychic energy can be displaced from one idea to another along certain association channels, and about the almost indestructible conservation of the traces of psychic processes, have actually made it possible for me to attempt such a representation of the unknown. In order to obviate the possibility of a misunderstanding I must add that I am making no attempt to proclaim that cells and fibers, or the neuron system in vogue nowadays, represent these psychic paths, even if such paths would have to be represented by the organic elements of the nervous system in a manner which cannot yet be indicated. _Laughter as a Discharge_