The Apostle Paul
1 Corinthians 15:51ESV·traditional attribution

Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed,

John Calvin Reformed @genevareformer

Hitherto he has included two things in his reasoning. In the first place, he shows that there will be a resurrection from the dead: secondly, he shows of what nature it will be. Now, however, he enters more thoroughly into a description of the manner of it.

Matthew Henry Presbyterian @wholebiblehenry

To confirm what he had said of this change, I. He here tells them what had been concealed from or unknown to them till then - that all the saints would not die, but all would be changed. Those that are alive at our Lord's coming will be caught up into the clouds, without dying, Th1 4:11.

Commenting on 1 Corinthians 15:51-57

John Gill Reformed Baptist @doctorgill

So when this corruptible shall have put on incorruption,.... As at the coming of Christ, both the bodies of living saints, and of dead ones being raised, will: and this mortal shall have put on immortality; which will be the case, in the resurrection morn: then shall be brought to pass that saying that is written; then that passage will have its full accomplishment, which...