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 interpreting dreams to the interpretation of reciting certain Surahs of the Qur'an in one's dream. He writes that it is important for a layperson to seek assistance from an alim (Muslim scholar) who could guide in the interpretation of dreams with a proper understanding of the cultural context and other such causes and interpretations. Al-Kindi (Alkindus) (801–873) also wrote a treatise on dream interpretation: "On Sleep and Dreams". In consciousness studies, Al-Farabi (872–951) wrote the "On the Cause of Dreams", which appeared as chapter 24 of his "Book of Opinions of the people of the Ideal City". It was a