Whether any prophecy comes from the demons?

❌ Objection 1 : It would seem that no prophecy comes from the demons. For prophecy is "a Divine revelation," according to Cassiodorus [*Prol. in Psalt. i]. But that which is done by a demon is not Divine. Therefore no prophecy can be from a demon.

❌ Objection 2 : Further, some kind of enlightenment is requisite for prophetic knowledge, as stated above (Question [171], Articles [2],3). Now the demons do not enlighten the human intellect, as stated above in the FP, Question [119], Article [3]. Therefore no prophecy can come from the demons.

❌ Objection 3 : Further, a sign is worthless if it betokens contraries. Now prophecy is a sign in confirmation of faith; wherefore a gloss on Rm. 12:6, "Either prophecy to be used according to the rule of faith," says: "Observe that in reckoning the graces, he begins with prophecy, which is the first proof of the reasonableness of our faith; since believers, after receiving the Spirit, prophesied." Therefore prophecy cannot be bestowed by the demons.