Reply Obj. 1: In point of fact there is one affirmative precept about religion, namely: "Remember that thou keep holy the Sabbath Day." Still the negative precepts had to be given first, so that by their means the obstacles to religion might be removed. For though affirmation naturally precedes negation, yet in the process of generation, negation, whereby obstacles are removed, comes first, as stated in the Article. Especially is this true in matters concerning God, where negation is preferable to affirmation, on account of our insufficiency, as Dionysius observes (Coel. Hier. ii).
Reply Obj. 2: People worshiped strange gods in two ways. For some served certain creatures as gods without having recourse to images. Hence Varro says that for a long time the ancient Romans worshiped gods without using images: and this worship is first forbidden by the words, "Thou shalt not have strange gods." Among others the worship of false gods was observed by using certain images: and so the very making of images was fittingly forbidden by the words, "Thou shalt not make to thyself any graven thing," as also the worship of those same images, by the words, "Thou shalt not adore them," etc.
Reply Obj. 3: All other kinds of superstition proceed from some compact, tacit or explicit, with the demons; hence all are understood to be forbidden by the words, "Thou shalt not have strange gods." _______________________
THIRD ARTICLE [II-II, Q. 122, Art. 3]
Whether the Second Precept of the Decalogue Is Fittingly Expressed?
Objection 1: It seems that the second precept of the decalogue is unfittingly expressed. For this precept, "Thou shalt not take the name of thy God in vain" is thus explained by a gloss on Ex. 20:7: "Thou shalt not deem the Son of God to be a creature," so that it forbids an error against faith. Again, a gloss on the words of Deut. 5:11, "Thou shalt not take the name of . . . thy God in vain," adds, i.e. "by giving the name of God to wood or stone," as though they forbade a false confession of faith, which, like error, is an act of unbelief. Now unbelief precedes superstition, as faith precedes religion. Therefore this precept should have preceded the first, whereby superstition is forbidden.
Obj. 2: Further, the name of God is taken for many purposes—for instance, those of praise, of working miracles, and generally speaking in conjunction with all we say or do, according to Col. 3:17, "All whatsoever you do in word or in work . . . do ye in the name of the Lord." Therefore the precept forbidding the taking of God's name in vain seems to be more universal than the precept forbidding superstition, and thus should have preceded it.
Obj. 3: Further, a gloss on Ex. 20:7 expounds the precept, "Thou shalt not take the name of . . . thy God in vain," namely, by swearing to nothing. Hence this precept would seem to forbid useless swearing, that is to say, swearing without judgment. But false swearing, which is without truth, and unjust swearing, which is without justice, are much more grievous. Therefore this precept should rather have forbidden them.
Obj. 4: Further, blasphemy or any word or deed that is an insult to God is much more grievous than perjury. Therefore blasphemy and other like sins should rather have been forbidden by this precept.
Obj. 5: Further, God's names are many. Therefore it should not have been said indefinitely: "Thou shalt not take the name of . . . thy God in vain."