Daily Reading for November 10 • Leo the Great, Bishop of Rome, 461
The whole body of the faithful profess that they “believe in God the Father Almighty, and in Jesus Christ his only Son our Lord, who was born of the Holy Ghost and the Virgin Mary.” By which three clauses the engines of almost all heretics are shattered. For when God is believed to be both “Almighty” and “Father,” it is proved that the Son is everlasting together with himself, differing in nothing from the Father, because he was born as “God from God,” Almighty from Almighty, Coeternal from Eternal; not later in time, not inferior in power, not unlike him in glory, not divided from him in essence, but the same Only-begotten and Everlasting Son of an Everlasting Parent who was “born of the Holy Ghost and the Virgin Mary.” This birth in time in no way detracted form, in no way added to, that divine and everlasting birth; but expended itself wholly in the work of restoring man, who had been deceived; so that it might both overcome death, and by its power “destroy the devil who had the power of death.” For we could not have overcome the author of sin and of death, unless he who could neither be contaminated by sin, nor detained by death, had taken upon himself our nature, and made it his own.
From The Tome of Leo, quoted in Readings in the History of Christian Theology, Volume 1: From Its Beginnings to the Eve of the Reformation, by William C. Placher (Westminster / John Knox, 1988).