2 Thessalonians 2:4

Paul therefore, in speaking of Antichrist, would not have passed over these things if they had been profitable. Let us not therefore enquire into these things. For he will not come so bending his knees, but "exalting himself against all that is called God, or that is worshiped; so that he sitteth in the temple of God, setting himself forth as God." For as the devil fell by pride, so he who is wrought upon by him is anointed unto pride.

"And exalteth himself against all that is called God or is worshiped." For he will not introduce idolatry, but will be a kind of opponent to God; he will abolish all the gods, and will order men to worship him instead of God, and he will be seated in the temple of God, not that in Jerusalem only, but also in every Church. "Setting himself forth," he says; he does not say, saying it, but endeavoring to show it. For he will perform great works, and will show wonderful signs.

No one can doubt that Paul is here speaking of Antichrist, telling us that the day of judgment (which he calls the day of the Lord) will not come without the prior coming of a figure whom he calls the Apostate, meaning, of course, an apostate from the Lord God. And if this appellation can rightly be attached to all the ungodly, how much more to him! There is, however, some uncertainty about the "temple" in which he is to take his seat. Is it the ruins of the temple built by King Solomon, or actually in a church? For the apostle would not say "the temple of God" if he meant the temple of some idol or demon. For that reason some people would have it that Antichrist means here not the leader himself but what we may call his whole body, the multitude, that is, of those who belong to him, together with himself, their leader.… For myself I am much astonished at the great presumption of those who venture such guesses.