Whether demons can lead men astray by means of real miracles? Whether a demon who is overcome by man, is for this reason hindered from making further assaults?

❌ Objection 1 : It would seem that the demons cannot lead men astray by means of real miracles. For the activity of the demons will show itself especially in the works of Antichrist. But as the Apostle says (2 Thess. 2:9), his "coming is according to the working of Satan, in all power, and signs, and lying wonders." Much more therefore at other times do the demons perform lying wonders. It would seem that a demon who is overcome by a man, is not for that reason hindered from any further assault. For Christ overcame the tempter most effectively. Yet afterwards the demon assailed Him by instigating the Jews to kill Him. Therefore it is not true that the devil when conquered ceases his assaults.

❌ Objection 2 : Further, true miracles are wrought by some corporeal change. But demons are unable to change the nature of a body; for Augustine says (De Civ. Dei xviii, 18): "I cannot believe that the human body can receive the limbs of a beast by means of a demon's art or power." Therefore the demons cannot work real miracles. Further, to inflict punishment on one who has been worsted in a fight, is to incite him to a sharper attack. But this is not befitting God's mercy. Therefore the conquered demons are not prevented from further assaults.

❌ Objection 3 : Further, an argument is useless which may prove both ways. If therefore real miracles can be wrought by demons, to persuade one of what is false, they will be useless to confirm the teaching of the faith. This is unfitting; for it is written (Mk. 16:20): "The Lord working withal, and confirming the word with signs that followed."