[chette777]

It also speaks of the Dead shall rise incorruptible, this corruption must put on incorruption, this mortal must put on the immortality.

it speaks both of the event of catching away and the transformation that takes place. you cannot pick and choose which part of the verse is at the twinkling of an eye when all the event is one the rising of the dead and the catching away of the living, one to put on incoruption and one to immortality.