Chapter 33 — Part IV: Prayer — On Prayer in General
Section 63. We do not address God and the Saints in the same manner, for we implore God to grant us blessings or to deliver us from evils; while we ask the Saints, since they are the friends of God, to take us under their patronage and to obtain for us from God whatever we need. Hence we make use of two different forms of prayer. To God, we properly say: Have mercy on us, Hear us; but to the Saints, Pray for us. Still we may also ask the Saints, though in a different sense, that they have mercy on us, for they are most merciful. Thus we may beseech them that, touched with the misery of our condition, they would interpose in our behalf their influence and intercession before God.