And God, at the same time, by the Word and by the rite, moves hearts to believe and conceive faith, just as Paul says, Rom. 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.
Apology of the Augsburg Confession, XIII, #5. Book of Concord.
