Annum Sacrum is an 1899 encyclical letter by Pope Leo XIII exhorting consecration to the Sacred Heart of Jesus Christ. The Leonine mixture of devotional and political theology in this letter is worthy of study. One interesting feature that stood out to me when reading the letter today was the way in which Pope Leo XIII appeals to St. Thomas Aquinas’s exposition of the judiciary power of Christ in Question 59 of the Tertia Pars of the Summa Theologiae. These articles comprise underappreciated aspect of Aquinas’s juridical theology. Pope Leo XIII writes:
6. How it comes about that infidels themselves are subject to the power and dominion of Jesus Christ is clearly shown by St. Thomas, who gives us the reason and its explanation. For having put the question whether His judicial power extends to all men, and having stated that judicial authority flows naturally from royal authority, he concludes decisively as follows: “All things are subject to Christ as far as His power is concerned, although they are not all subject to Him in the exercise of that power” (3a., p., q. 59, a. 4). This sovereign power of Christ over men is exercised by truth, justice, and above all, by charity.
[Original Latin Text:] Cur autem ipsi infideles potestate dominatuque Iesu Christi teneantur, caussam sanctus Thomas rationemque, edisserendo, docet. Cum enim de iudiciali eius potestate quaesisset, num ad homines porrigatur universos, affirmassetque, iudiciaria potestas consequitur potestatem regiam, plane concludit: Christo omnia sunt subiecta quantum ad potestatem, etsi nondum sunt ei subiecta quantum ad executionem potestatis (3 p. q. 39 a. 4). Quae Christi potestas et imperium in homines exercetur per veritatem, per iustitiam, maxime per caritatem.