Whether in the demons there is faith?

Objections

Objection 1 : It would seem that the demons have no faith. For Augustine says (De Praedest. Sanct. v) that "faith depends on the believer's will": and this is a good will, since by it man wishes to believe in God. Since then no deliberate will of the demons is good, as stated above (FP, Question [64], Article [2], ad 5), it seems that in the demons there is no faith.
Objection 2 : Further, faith is a gift of Divine grace, according to Eph. 2:8: "By grace you are saved through faith . . . for it is the gift of God." Now, according to a gloss on Osee 3:1, "They look to strange gods, and love the husks of the grapes," the demons lost their gifts of grace by sinning. Therefore faith did not remain in the demons after they sinned.
Objection 3 : Further, unbelief would seem to be graver than other sins, as Augustine observes (Tract. lxxxix in Joan.) on Jn. 15:22, "If I had not come and spoken to them, they would not have sin: but now they have no excuse for their sin." Now the sin of unbelief is in some men. Consequently, if the demons have faith, some men would be guilty of a sin graver than that of the demons, which seems unreasonable. Therefore in the demons there is no faith.