"On Preaching" from the Confessions (#13)

The Word of God is the true holy thing above all holy things. Indeed, it is the only one we Christians acknowledge and have. Though we had the bones of all the saints or all the holy and consecrated vestments gathered together in one heap, they could not help us in the slightest degree, for they are all dead things that can sanctify no one. But God’s Word is the treasure that sanctifies all things. By it all the saints themselves have been sanctified. At whatever time God’s Word is taught, preached, heard, read, or pondered, there the person, the day, and the work are sanctified by it, not on account of the external work but on account of the Word which makes us all saints. Accordingly, I constantly repeat that all our life and work must be guided by God’s Word if they are to be God-pleasing or holy. (Tappert, The Book of Concord. Fortress Press: Philadelphia, 1959, p.377; Large Catechism, 10 Commandments, 3rd: 91-2)