Eternal sin
Thomas Aquinas lists, or has responded to, six sins that supposedly go against the Holy Spirit:
Thomas Aquinas explains that the unforgivability of blasphemy against the Holy Spirit means that it removes the entrance to these means of salvation; however, it cannot hinder God in taking away this obstacle by way of a miracle.
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.