Charles Ellicott Commentary 1 Corinthians 15:25

"For he must reign, till he hath put all his enemies under his feet." — 1 Corinthians 15:25 (ASV)

He must reign.—It is a moral consequence. God must triumph, and so the Son must reign and conquer until that triumph is complete. Some suggest that the force of these words is that He must reign, etc., because it has been prophesied (Psalms 110); but the more obvious truth is that it was prophesied because it is morally necessary.