The teaching in this passage is that Christ has become the first fruits of the dead—He was the first to be resurrected from the dead; and then all true believers in Christ will correspondingly be made alive in their own order. This means that there will be a certain order of resurrections of all believers of all times.

The first resurrection will be of church believers just before those who are raptured (1 Thess. 4:15-17). The next two resurrections will be of the tribulation saints and the Old Testament saints. These resurrections will be at His second coming, just before the millennial kingdom. The last resurrection will be of the believers during the millennium. We don’t know exactly when this will occur. They may be resurrected to eternal life individually, immediately after each one dies; or they may possibly be resurrected all at once just prior to the destruction…