What does 1 Corinthians 15:54 mean?
The significance of this moment, still in the future, cannot be over-emphasized. Paul is speaking of the moment when all God's promises to share eternal glory with those who come to Him by faith in Christ will begin to come true. In this moment, every single person who has ever believed in Jesus, dead and alive, will be finally and fully transformed into the glorified reality God has planned for His children since before time began (1 Corinthians 15:42–44; 1 Thessalonians 4:15–17; 1 John 3:2).Our death-stained natural bodies will be gone forever, replaced by glorified, immortal bodies that will exist eternally with our Father. Finally, the ancient prophecies will be fulfilled. Paul paraphrases two of those statements in this and the following verse. First, he references Isaiah 25:8 to declare that this will be the moment when death is defeated for good, when it is "swallowed up in victory."