29 And would you know how they who teach the contrary ran into such madness? They read wrongly that good word of the Apostle, For He must reign, till He has put all enemies under His feet; and they say, when His enemies shall have been put under His feet, He shall cease to reign, wrongly and foolishly alleging this. For He who is king before He has subdued His enemies, how shall He not the rather be king, after He has gotten the mastery over them.
Source: Catechetical Lectures (New Advent)