Catechism of the Catholic Church

On entering the People of God through faith and Baptism, one receives a share in this people's unique, priestly vocation: "Christ the Lord, high priest taken from among men, has made this new people a kingdom of priests to God, his Father.' The baptized, by regeneration and the anointing of the Holy Spirit, are consecrated to be a spiritual house and a holy priesthood." (1268, 1546)