1 Corinthians 15:25

For He must reign, till He hath put all enemies under His feet. I e., Christ must rule the Church till God the Father puts all the devils and the wicked under Him. Till does not denote an end of His reign, for there is no doubt that when His enemies shall have been overcome Christ will reign more truly and for ever, though in another way and with other glory than now. Cf. S. Chrysostom. It signifies what may have been done before a certain event, not what was done afterwards. So Joseph (S. Mat 1:25) is said not to have known Mary his wife till she brought forth her Son, not as though he knew her afterwards, as the impure Helvidius insinuates, but that he did not know her before she conceived and gave birth; for S. Matthew merely wished to record a wonderful event that was naturally incredible, viz., the conception and birth of Christ from a virgin without a father. So Paul says here that even now, while the Church is struggling with her enemies, Christ reigns over her. Moreover, it follows from this that Christ will reign after the struggle and triumph, for S. Paul implies but does not state what is evident to all. S. Augustine (Sentences, n. 169) well says: " As long as we are struggling against sins there is no perfect peace; for those that oppose us are crushed in dangerous fight, and those have been overcome are not yet triumphed over in peaceful land where care cannot come, but are still kept down by a power that must ever be on its guard."

The last enemy that shall be destroyed is death. That death which still reigns over the bodies of the saints will be altogether destroyed at the resurrection. The first enemy of Christ and His followers is the devil, who was conquered by Christ on the Cross. The second is sin, which, through the grace of Christ, is being conquered by Christians in this life. The third is death, which will be the last to be overcome, and that will he in the resurrection.