Whether the first movements of the sensuality in unbelievers are mortal sin?

❌ Objection 1 : It would seem that the first movements of the sensuality in unbelievers are mortal sins. For the Apostle says (Rm. 8:1) that "there is . . . no condemnation to them that are in Christ Jesus, who walk not according to the flesh": and he is speaking there of the concupiscence of the sensuality, as appears from the context (Rm. 7). Therefore the reason why concupiscence is not a matter of condemnation to those who walk not according to the flesh, i.e. by consenting to concupiscence, is because they are in Christ Jesus. But unbelievers are not in Christ Jesus. Therefore in unbelievers this is a matter of condemnation. Therefore the first movements of unbelievers are mortal sins.

❌ Objection 2 : Further Anselm says (De Gratia et Lib. Arb. vii): "Those who are not in Christ, when they feel the sting of the flesh, follow the road of damnation, even if they walk not according to the flesh." But damnation is not due save to mortal sin. Therefore, since man feels the sting of the flesh in the first movements of the concupiscence, it seems that the first movements of concupiscence in unbelievers are mortal sins.

❌ Objection 3 : Further, Anselm says (De Gratia et Lib. Arb. vii): "Man was so made that he was not liable to feel concupiscence." Now this liability seems to be remitted to man by the grace of Baptism, which the unbeliever has not. Therefore every act of concupiscence in an unbeliever, even without his consent, is a mortal sin, because he acts against his duty.