And yet nowhere does St. Paul nor any other apostle or other figure of early Christianity ever preach a universal apostasy that would make the Church so corrupted as to need to be 'restored' later by the coming of another prophet with another gospel.
2 Thessalonians 2:1-7 King James Version (KJV)
2 Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,
2 That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.
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.
5 Remember ye not, that, when I was yet with you, I told you these things?
6 And now ye know what withholdeth that he might be revealed in his time.
7
For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
How universal is this "falling away"
Pau is telling the Thessalonians that Jesus's return is not imminent. As proof of that he tells them that Jesus will not return until there is a "falling away" first, and the man of sin be revealed.
Then he says this mystery of iniquity doth already work and so we know that the "falling away" is going to happen in their time, not in our time.
Again, how universal is this "falling away"?