"If we call Sacraments rites which have the command of God, and to which the promise of grace has been added, it is easy to decide what are properly Sacraments...Therefore Baptism, the Lord's Supper, and Absolution, which is the Sacrament of Repentance, are truly Sacraments. For these rites have God's command and the promise of grace, which is peculiar to the New Testament. For when we are baptized, when we eat the Lord's body, when we are absolved, our hearts must be firmly assured that God truly forgives us for Christ's sake. And God, at the same time, by the Word and by the rite, moves hearts to believe and conceive faith, just as Paul says, Romans 10:17: 'Faith cometh by hearing.' But just as the Word enters the ear in order to strike our heart, so the rite itself strikes the eye, in order to move the heart. The effect of the Word and of the rite is the same as it has been well said by Augustine that a Sacrament is a visible word, because the rite is received by the eyes, and is, as it were, a picture of the Word, signifying the same thing as the Word. Therefore the effect of both is the same."
[Luther, Bab Captivity, 3 sacraments]
Apology Augsburg Confession, XIII,#3. Number/Use Sacraments. Concordia Triglotta, St. Louis: Concordia Publishing House, 1921, p. 309. Tappert, p. 211. Heiser, p. 94.
