Albert Barnes Commentary 1 Corinthians 15:53

"For this corruptible must put on incorruption, and this mortal must put on immortality." — 1 Corinthians 15:53 (ASV)

For this corruptible, etc. It is necessary that a change take place, either by dying and then being raised, or by being changed without seeing death; for we cannot enter heaven as we are now.

Must put on. The word used here (endunw) properly means to go in, to envelop, to put on as a garment, and then to put on anything. The soul, for example, is, so to speak, clothed with or invested with a body. And in this specific passage, it means to be invested with or furnished with.

This is equivalent to saying that this corruptible must become incorruptible, and this mortal must become immortal. We must cease to be corruptible and mortal, and must become incorruptible and immortal.

The righteous who remain until the coming of Christ will be at once changed and invested, as Enoch and Elijah were, with incorruption and immortality.