In 2 Thessalonians, Paul says that the Day of Christ would not come until first, the Man of Sin should be revealed:


"3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
4 Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.


6 And now ye know what withholdeth that he might be revealed in his time."


Although false prophets and false christs would appear at different times during the Church Age, neverthe less, a man of wickedness shall arise at the end of the age, whose hatred of Christ will exceed anything that ever occurred in the history of the world.


He is called the Son of Perdition who exalts himself above everything that is called God and shows himself as God.