Whether the act of sin is from God?

Objections

Objection 1 : It would seem that the act of sin is not from God. For Augustine says (De Perfect. Justit. ii) that "the act of sin is not a thing." Now whatever is from God is a thing. Therefore the act of sin is not from God.
Objection 2 : Further, man is not said to be the cause of sin, except because he is the cause of the sinful act: for "no one works, intending evil," as Dionysius states (Div. Nom. iv). Now God is not a cause of sin, as stated above (Article [1]). Therefore God is not the cause of the act of sin.
Objection 3 : Further, some actions are evil and sinful in their species, as was shown above (Question [18], Articles [2],8). Now whatever is the cause of a thing, causes whatever belongs to it in respect of its species. If therefore God caused the act of sin, He would be the cause of sin, which is false, as was proved above (Article [1]). Therefore God is not the cause of the act of sin.