2 Thessalonians 2:3

let no man beguile you in any wise: for it will not be, except the falling away come first [Paul uses the article "the" because this apostasy was well known to the church, its coming having been announced by Jesus (Matthew 24:10-12), and reiterated by Paul while at Thessalonica. This apostasy, or falling away, may be defined to be a desertion of the true religion and the true God], and the man of sin be revealed, the son of perdition [Literally, son of perishing. The man of sin is identical with the antichrist of 1 John 2:18. Though he is distinguished from Satan in verse 9, yet is he in a sense an incarnation of Satan, for as Satan entered into the heart of Judas (John 13:27), who was the first great apostate and son of perdition (John 17:12), so he shall enter into the heart of this second apostate and son of perdition, who shall be a man made up of sin, a veritable manifestation of concrete wickedness, and thus self-fitted for perdition. The language clearly shows that he is a person, but there is nothing to forbid us from regarding him as an official rather than an individual personality, as, for instance, a line of popes rather than an individual pope. Those who have denied the right to thus construe his personality, have for the most part straightway fallen into the solecism of interpreting the phrase "one that restraineth," of verse 7, so as to make it mean a line of emperors, or succeeding generations of rulers in our human polity, or some other official personality that existed in Paul's day and long afterward, though the assertion of personality is as strong in verse 7 as it is in verse 3. Antichrist does not cause the apostasy, but is rather the cap-sheaf of it, being revealed in connection with it, and exalted by it],