1 And not only by the particulars already mentioned, but also by means of the events which shall occur in the time of Antichrist is it shown that he, being an apostate and a robber, is anxious to be adored as God; and that, although a mere slave, he wishes himself to be proclaimed as a king. For he (Antichrist) being endued with all the power of the devil, shall come, not as a righteous king, nor as a legitimate king, [i.e., one] in subjection to God, but an impious, unjust, and lawless one; as an apostate, iniquitous and murderous; as a robber, concentrating in himself [all] satanic apostasy, and setting aside idols to persuade [men] that he himself is God, raising up himself as the only idol, having in himself the multifarious errors of the other idols.
This he does, in order that they who do [now] worship the devil by means of many abominations, may serve himself by this one idol, of whom the apostle thus speaks in the second Epistle to the Thessalonians: “Unless there shall come a failing away first, and the man of sin shall be revealed, the son of perdition, who opposes and exalts himself above all that is called God, or that is worshipped; so that he sits in the temple of God, showing himself as if he were God.” The apostle therefore clearly points out his apostasy, and that he is lifted up above all that is called God, or that is worshipped— that is, above every idol — for these are indeed so called by men, but are not [really] gods; and that he will endeavour in a tyrannical manner to set himself forth as God.
Source: Adversus haereses (New Advent)