For this perishable body must put on the imperishable, and this mortal body must put on immortality.
53. For this corruptible must Mark, how we shall live in the kingdom of God both in body and in soul, while at the same time flesh and blood cannot inherit the kingdom of God — for they shall previously be delivered from corruption.
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
The sting of death is sin,.... Death has a sting, and which was originally in it, and that is sin; sin is the cause of death, it is what has given rise and being to it; it entered into the world by it, and is supported in its empire through it; it gives it its resistless power, which reaches to all sorts of persons, young...