In his Opinions of the People of the Ideal City, al-Farabi expressed that a separated person may not accomplish all the idealizations by himself, without the help of other people. It is the intrinsic mien of each man to connect another human being or other men within the labor he has to be performed. Subsequently, to realize what he can of that flawlessness, each man must remain within the neighborhood of others and relate with them. In chapter 24 of aforementioned text— On the Cause of Dreams, he distinguished between dream interpretation and the nature and causes of dreams.