In this article, human nature is studied and a comparison is made between psychologists' viewpoints, Quranic verses, and Imam Ali's(a.s) sayings. The comparison first covers the Jewish and Christian thoughts on human hature, then proceeds to dividing the psychologists' viewpoints into three groups: 1. A group who consider human nature as evil, 2. A group who consider it as good, 3. A group that view man both demonish and angelic.
There are indications in the Qur'anic verses and Ali's(a.s) sayings confirming the third viewpoint, for man possesses both animal and human aspects as well as dichotomous tendencies.
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