Eternal sin
In Christian hamartiology, eternal sins, unforgivable sins, or unpardonable sins are sins which will not be forgiven by God. One eternal or unforgivable sin (blasphemy against the Holy Spirit) is specified in several passages of the Synoptic Gospels, including , , and .
Ten Commandments
In Gospel of Barnabas, Jesus stated that idolatry is the greatest sin as it divests a man fully of faith, and hence of God. In his time, Idolatry is 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.