Saint Henry: "the heart of the king and the heart of the people trembled"

Unless your faith is firm you shall not be firm!

-- Is 7:1-9

Finally, the People of God shares in the royal office of Christ. He exercises his kingship by drawing all men to himself through his death and Resurrection. Christ, King and Lord of the universe, made himself the servant of all, for he came "not to be served but to serve, and to give his life as a ransom for many." For the Christian, "to reign is to serve him," particularly when serving "the poor and the suffering, in whom the Church recognizes the image of her poor and suffering founder." The People of God fulfills its royal dignity by a life in keeping with its vocation to serve with Christ.

The sign of the cross makes kings of all those reborn in Christ and the anointing of the Holy Spirit consecrates them as priests, so that, apart from the particular service of our ministry, all spiritual and rational Christians are recognized as members of this royal race and sharers in Christ's priestly office. What, indeed, is as royal for a soul as to govern the body in obedience to God? And what is as priestly as to dedicate a pure conscience to the Lord and to offer the spotless offerings of devotion on the altar of the heart?

-- CCC 786

“We deem it opportune to remind our children of their duty to take an active part in public life and to contribute toward the attainment of the common good of the entire human family as well as to that of their own political community. They should endeavor, therefore, in the light of their Christian faith and led by love, to insure that the various institutions—whether economic, social, cultural or political in purpose—should be such as not to create obstacles, but rather to facilitate or render less arduous man’s perfecting of himself in both the natural order and the supernatural.... Every believer in this world of ours must be a spark of light, a center of love, a vivifying leaven amidst his fellow men. And he will be this all the more perfectly, the more closely he lives in communion with God in the intimacy of his own soul” (Blessed Pope John XXIII, Peace on Earth, 146, 164).