Roman Catechism 4.17

Chapter 4 — Part I: The Creed — Article II: And in Jesus Christ, His Only Son, Our Lord

Section 17. Christ not only as God, but also as man and partaker of our nature, we acknowledge to be a King. Of Him the Angel testified: He shall reign in the house of Jacob for ever. And of his kingdom there shall be no end. This kingdom of Christ is spiritual and eternal, begun on earth but perfected in heaven. He discharges by His admirable Providence the duties of King towards His Church, governing and protecting her against the assaults and snares of her enemies, legislating for her and imparting to her not only holiness and righteousness, but also the power and strength to persevere. But although the good and the bad are found within the limits of this kingdom, and thus all men by right belong to it, yet those who in conformity with His commands lead unsullied and innocent lives, experience beyond all others the sovereign goodness and beneficence of our King. Although descended from the most illustrious race of kings, He obtained this kingdom not by hereditary or other human right, but because God bestowed on Him as man all the power, dignity and majesty of which human nature is capable. To Him, therefore, God delivered the government of the whole world, and to this His sovereignty, which has already commenced, all things shall be made fully and entirely subject on the day of judgment.