The Dream - Introduction into the Psychology of Dreams condensation and allusion ("Anspielung"), which also occur in Freuds The Interpretation of Dreams, are explained and exemplified. A further component of dream analysis are higher value complexes ("hochwertige Komplexe"), and their readiness, as well as means of depiction ("Darstellungsmittel") and the functional symbolism of dreams. Silberer further shares his opinion on supererogation ("Mehrleistung") of dreams, meaning the output of dreams that goes beyond the usual functioning of the mind (or soul). He concludes that, in contrast to the common view at that time, a dream does not actually possess increased capabilities regarding memory, unconscious operations, humour or spirit. However, to
Dream interpretation treatise on dreams, in which he was the first to distinguish between dream interpretation and the nature and causes of dreams. In "The Canon of Medicine", Avicenna extended the theory of temperaments to encompass "emotional aspects, mental capacity, moral attitudes, self-awareness, movements and dreams." Ibn Khaldun's "Muqaddimah" (1377) states that "confused dreams" are "pictures of the imagination that are stored inside by perception and to which the ability to think is applied, after (man) has retired from sense perception." Ibn Shaheen states: Interpretations change their foundations according to the different conditions of the seer (of the vision),so seeing handcuffs during