The doctrine that the rapture of believers occurs in connection with the resurrection of the dead at Christ's return was specifically revealed to the Apostle Paul. This teaching is found in 1 Thessalonians 4:15-17 and 1 Corinthians 15:51-52, where Paul shares a "mystery" (something previously unknown or not fully revealed):
1 Thessalonians 4:15-17: Paul explains that the Lord will descend from heaven, the dead in Christ will rise first, and then those who are alive will be "caught up" together with them in the clouds to meet the Lord.
1 Corinthians 15:51-52: Paul further reveals that not all believers will die, but in an instant, at the last trumpet, the dead will be raised, and the living will be transformed.
This specific sequence and understanding of the rapture, resurrection, and transformation of believers was a revelation given to Paul, which had not been previously disclosed in such clear terms in earlier scripture. Therefore, it is an example of a new revelation that became part of the New Testament.
— ChatGPT
