Listen to this secret truth: we shall not all die, but when the last trumpet sounds, we shall all be changed in an instant, as quickly as the blinking of an eye. For when the trumpet sounds, the dead will be raised, never to die again, and we shall all be changed. 1
References for 1 Corinthians 15:51
15.51, 52 +22 Esd 6.23; +11 Th 4.15-17.
For what is mortal must be changed into what is immortal; what will die must be changed into what cannot die.
So when this takes place, and the mortal has been changed into the immortal, then the scripture will come true: "Death is destroyed; victory is complete!" 2
References for 1 Corinthians 15:54
15.54 Is 25.8.
"Where, Death, is your victory? 3 Where, Death, is your power to hurt?"
References for 1 Corinthians 15:55
15.55 Ho 13.14 (LXX).
Death gets its power to hurt from sin, and sin gets its power from the Law.