You shall not misuse the name of the Lord your God.
59 For by nature we all have within us this beautiful virtue, to wit, that whoever has committed a wrong would like to cover up and adorn his disgrace, so that no one may see it or know it; and no one is so bold as to boast to all the world of the wickedness he has perpetrated; all wish to act by stealth and without any one being aware of what they do. Then, if anyone be arraigned, the name of God is dragged into the affair and must make the villainy look like godliness, and the shame like honor. This is the common course of the world, which, like a great deluge, has flooded all lands.
61 Therefore, above all things, our young people should have this commandment earnestly enforced upon them, and they should be trained to hold this and the First Commandment in high regard; and whenever they transgress, we must at once be after them with the rod, and hold the commandment before them, and constantly inculcate it, so as to bring them up not only with punishment, but also in the reverence and fear of God.
62 Thus you now understand what it is to take God’s name in vain, that is (to recapitulate briefly), either simply for purposes of falsehood, and to allege God’s name for something that is not so, or to curse, swear, conjure, and, in short, to practise whatever wickedness one may.
63 Besides this you must also know how to use the name [of God] aright. For when saying: Thou shalt not take the name of the Lord, thy God, in vain, He gives us to understand at the same time that it is to be used properly. For it has been revealed and given to us for the very purpose that it may be of constant use and profit.