For then shall Satan be unchained, and work through Antichrist in all his power, wonderfully indeed, but falsely. But a doubt is often raised whether the Apostle said “signs and lying wonders,” because he is to deceive mortal sense, by phantoms, so as to appear to do what he does not, or because those wonders themselves, even though true, are to turn men aside to lies, because they will not believe that any power but a Divine power could do them, being ignorant of the power of Satan, especially when he shall have received such power as he never had before. But for whichever reason it is said, they shall be deceived by those signs and wonders who deserve to be deceived.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: de Civ. Dei, xx, 19