Gospel of Barnabas
In the non-canonical Gospel of Barnabas, it is claimed that Jesus stated that idolatry is the greatest sin as it divests a man fully of faith, and hence of God. The words attributed to Jesus prohibit not only worshipping statues of wood or stone; but also statues of flesh. "...all which a man loves, for which he leaves everything else but that, is his god, thus the glutton and drunkard has for his idol his own flesh, the fornicator has for his idol the harlot and the greedy has for his idol silver and gold, and so the same for every other sinner." Idolatory was thus the basic sin, which manifested in various acts or thoughts, which displace the primacy of God. However, the Gospel of Barnabas does not form part of the Christian bible. It is known only from 16th- and 17th-century manuscripts, and frequently reflects Islamic rather than Christian understandings, so it cannot be taken as authoritative on Christian views.