The Third Commandment.
Accordingly, when asked, What is meant by the commandment: Thou shalt sanctify the holy day? answer: To sanctify the holy day is the same as to keep it holy. But what is meant by keeping it holy? Nothing else than to be occupied in holy words, works, and life.
For the day needs no sanctification for itself; for in itself it has been created holy [from the beginning of the creation it was sanctified by its Creator]. But God desires it to be holy to you. Therefore it becomes holy or unholy on your account, according as you are occupied on the same with things that are holy or unholy.
How, then, does such sanctification take place? Not in this manner, that [with folded hands] we sit behind the stove and do no rough [external] work, or deck ourselves with a wreath and put on our best clothes, but (as has been said) that we occupy ourselves with God's Word, and exercise ourselves therein.
And, indeed, we Christians ought always to keep such a holy day, and be occupied with nothing but holy things, i.e., daily be engaged upon God's Word, and carry it in our hearts and upon our lips. But (as has been said) since we do not at all times have leisure, we must devote several hours a week for the sake of the young, or at least a day for the sake of the entire multitude, to being concerned about this alone, and especially urge the Ten Commandments, the Creed, and the Lord's Prayer, and thus direct our whole life and being according to God's Word. At whatever time, then, this is being observed and practised, there a true holy day is being kept; otherwise it shall not be called a Christians' holy day. For, indeed, non-Christians can also cease from work and be idle, just as the entire swarm of our ecclesiastics, who stand daily in the churches, singing, and ringing bells but keeping no holy day holy, because they neither preach nor practises God's Word, but teach and live contrary to it.
For the Word of God is the sanctuary above all sanctuaries, yea, the only one which we Christians know and have. For though we had the bones of all the saints or all holy and consecrated garments upon a heap, still that would help us nothing; for all that is a dead thing which can sanctify nobody. But God's Word is the treasure which sanctifies everything, and by which even all the saints themselves were sanctified. At whatever hour then, God's
Word is taught, preached, heard, read or meditated upon, there the person, day, and work are sanctified thereby, not because of the external work, but because of the Word which makes saints of us all. Therefore I constantly say that all our life and work must be ordered according to God's Word, if it is to be God-pleasing or holy. Where this is done, this commandment is in force and being fulfilled.
On the contrary, any observance or work that is practised without God's Word is unholy before God, no matter how brilliantly it may shine! even though it be covered with relics, such as the fictitious spiritual orders which know nothing of God's Word and seek holiness in their own works.