“Among the various indications that make the holiness of God known to men, the most convincing sign is the holiness of men, who are sanctified by the divine indwelling . . . In teaching us the words, ‘hallowed be Thy name,’ our Lord also bids us, when we pray, to ask that God may be glorified by our lives. The sense of the prayer is this: ‘Grant us so to live, that all men may glorify Thee through us.’ God is sanctified or hallowed in the minds of other men through us, to the extent that we are sanctified by Him. Hence when we say: ‘hallowed be Thy name,’ we pray, as Cyprian remarks, that God’s name may be hallowed in us. Following the lead of Christ, who says: ‘Be holy, because I am holy,’ we beg that we, who have been sanctified in Baptism, may persevere in the state in which we began. Furthermore we pray daily to be sanctified in order that we, who daily fall, may wash away our sins by a constant process of purification.”
—St. Thomas Aquina