• 1 Corinthians 15:51-52, “Lo! I tell you a mystery. We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised imperishable, and we shall be changed.”
This also refers to the Second Coming of Christ, in that “the twinkling of an eye” refers to the instantaneous change from a mortal body to a glorified body, NOT to the speed of the rapture. Its connection to the blast of the “last trumpet”, heralds Christ’s Second Coming. The Catholic Church has consistently interpreted this passage as such for the last 2000 years.
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In your spare time, you might want to reconcile "Behold I come as a thief" (Rev 16:5) (nobody knows when a thief comes) with "For as the lightning comes out of the east, and shines even unto the west; so shall also the coming of the Son of man be" (Matt 24:27) (everybody'll see that).