Passage
in an instant, in [the] twinkling of an eye, at the last trumpet; for the trumpet shall sound, and the dead shall be raised incorruptible, and *we* shall be changed.
in an instant, in [the] twinkling of an eye, at the last trumpet; for the trumpet shall sound, and the dead shall be raised incorruptible, and *we* shall be changed.
1 Corinthians 15:50 But this I say, brethren, that flesh and blood cannot inherit God's kingdom, nor does corruption inherit incorruptibility.
1 Corinthians 15:51 Behold, I tell you a mystery: We shall not all fall asleep, but we shall all be changed,
1 Corinthians 15:52 in an instant, in [the] twinkling of an eye, at the last trumpet; for the trumpet shall sound, and the dead shall be raised incorruptible, and *we* shall be changed.
1 Corinthians 15:53 For this corruptible must needs put on incorruptibility, and this mortal put on immortality.
1 Corinthians 15:54 But when this corruptible shall have put on incorruptibility, and this mortal shall have put on immortality, then shall come to pass the word written: Death has been swallowed up in victory.
The verse centers on "instant", "twinkling", "last", "trumpet", "shall", "sound", and "dead". It is saying that the verse draws attention to "instant" and "twinkling", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 51's "Behold I tell you a mystery We..." into verse 53's "For this corruptible must needs put on...", so "instant" and "twinkling" belong inside that flow. In 1 Corinthians context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "instant" and "twinkling" with trust shaped by these words, not by a vague optimism outside the passage.