Writer revolutionary effect are Nicolaus Copernicus, who wrote "De revolutionibus orbium coelestium" (1543); Charles Darwin, who wrote "On the Origin of Species" (1859); and Sigmund Freud, who wrote "The Interpretation of Dreams" (1899). These three highly influential, and initially very controversial, works changed the way people understood their place in the world. Copernicus's heliocentric view of the cosmos displaced humans from their previously accepted place at the centre of the universe; Darwin's evolutionary theory placed humans firmly within, as opposed to above, the order of nature; and Freud's ideas about the power of the unconscious mind overcame the belief that humans
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