The Church has not received purely temporal Royalty from her Divine Founder, so it is here question of Spiritual Kingship only. But the Spiritual Kingship of Our Lord could not be exercised in an efficacious manner without a visible, permanent intermediary, capable of giving to souls at all times and in all places the directions needed for the safeguard and diffusion of the Divine Life. This mission has been confided only to the Catholic Church. Accordingly, in order to form an adequate idea of the Spiritual Kingship of Christ, we must consider its radiation down the centuries in the Church and through the Church in the world. The Pope and the Bishops are the representatives of Christ, the lieutenants of His Spiritual Royalty. They have the charge of holding up before the world the supernatural ideal of life to be lived by all men and laying down the laws and precepts to be observed, in order that that life may not be lost: to them it belongs to regulate the distribution of all the means confided to the Church by Our Lord for the development of the Divine Life, to establish fitting sanctions for all offences that jeopardise the interests of that life, and, finally, to carry on the struggle against the powers of evil by every form of missionary effort, following the example of Christ.

When the Church governs in the name of Christ she is truly a proper and principal, though subordinate, cause of her government. Thus, as Spouse of Christ and True Regent of souls on earth, she has the right that we should recognise her authority and should bow down before her. When, on the other hand, through her Priesthood and the Sacraments, she communicates grace to us, she is in this, only the instrument used by Christ to vivify our souls. It must, however, be remembered at once that, since the Sacred Humanity of Christ is immediately united to the Word, His Royalty and His Priesthood receive thereby a fullness, a universality and a perfection which can be participated in by the Church only in a limited fashion. Christ commands by His own authority, for all things are subject to Him. The Rulers of the Church have only the authority communicated to them by Christ.

The influence, then, which Christ exercises on the world, by His Priesthood and His Kingship, surpasses in extent and compass, even here below, the influence of the visible Church. All men, St. Thomas teaches, belong to Christ, even though they be heretics or pagans, and on them Christ can act in an invisible manner, by providing them with the help they need, in order to be converted, by even raising them to the Divine Life, if their invincible ignorance keeps them outside the one True Church. The Church always remains the centre from which the Divine Life, which is found in its fullness in Christ, radiates throughout the world. By right the Church is universal and her influence here below ever seeks to be co-extensive with that of her Divine Head and Founder. Men are subject to the Priesthood and Kingship of Christ while yet outside the Church, but in order to reap the full benefit, for the spiritual life, of this subjection to Our Lord, one must be fully incorporated into Christ, in accordance with the order He Himself has established. One must be a child of the Church, to which He has confided the infinite riches of the Redemption.