Whether all sins are due to the temptation of the devil?

❌ Objection 1 : It would seem that all sins are due to the temptation of the devil. For Dionysius says (Div. Nom. iv) that "the multitude of demons is the cause of all evils, both to themselves and to others." And Damascene says (De Fide Orth. ii, 4) that "all malice and all uncleanness have been devised by the devil."

❌ Objection 2 : Further, of every sinner can be said what the Lord said of the Jews (Jn. 8:44): "You are of your father the devil." But this was in as far as they sinned through the devil's instigation. Therefore every sin is due to the devil's instigation.

❌ Objection 3 : Further, as angels are deputed to guard men, so demons are deputed to assail men. But every good thing we do is due to the suggestion of the good angels: because the Divine gifts are borne to us by the angels. Therefore all the evil we do, is due to the instigation of the devil.