The communion of saints is a teaching of the Catholic faith that we profess in every recitation of the Creed at Mass. Pope St. Paul VI describes the dogma well in his 1968 “Credo of the People of God”: “We believe in the communion of all the faithful of Christ, those who are pilgrims on earth, the dead who are attaining their purification and the blessed in heaven, all together forming one church; and we believe that in this communion the merciful love of God and his saints is ever listening to our prayers.”