Institutes 2.8.26 — EXPOSITION OF THE MORAL LAW.
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**EXPOSITION OF THE MORAL LAW.**
The Anabaptists, not content with this moderate use of oaths, condemn all, without exception, on the ground of our Saviour’s general prohibition, “I say unto you, Swear not at all:” “Let your speech be Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil,” ( Mt. 5:34 ; James 5:12 ). In this way, they inconsiderately make a stumbling-stone of Christ, setting him in opposition to the Father, as if he had descended into the world to annul his decrees. In the Law, the Almighty not only permits an oath as a thing that is lawful (this were amply sufficient), but, in a case of necessity, actually commands it ( Exod. 22:11 ). Christ again declares, that he and his Father are one; that he only delivers what was commanded of his Father; that his doctrine is not his own, but his that sent him ( John 10:18 , 30 ; 7:16). What then? Will they make God contradict himself, by approving and commanding at one time, what he afterwards prohibits and condemns? But as there is some difficulty in what our Saviour says on the subject of swearing, it may be proper to consider it a little. Here, however, we shall never arrive at the true meaning, unless we attend to the design of Christ, and the subject of which he is treating. His purpose was, neither to relax nor to curtail the Law, but to restore the true and genuine meaning, which had been greatly corrupted by the false glosses of the Scribes and Pharisees. If we attend to this we shall not suppose that Christ condemned all oaths but those only which transgressed the rule of the Law. It is evident, from the oaths themselves, that the people were accustomed to think it enough if they avoided perjury, whereas the Law prohibits not perjury merely, but also vain and superfluous oaths. Therefore our Lord, who is the best interpreter of the Law, reminds them that there is a sin not only in perjury, but in swearing. How in swearing? Namely, by swearing vainly. Those oaths, however, which are authorised by the Law, he leaves safe and free. Those who condemn oaths think their argument invincible when they fasten on the expression, not at all . The expression applies not to the word swear , but to the subjoined forms of oaths. For part of the error consisted in their supposing, that when they swore by the heaven and the earth, they did not touch the name of God. The Lord, therefore, after cutting off the principal source of prevarication, deprives them of all subterfuges, warning them against supposing that they escape guilt by suppressing the name of God, and appealing to heaven and earth. For it ought here to be observed in passing, that although the name of God is not expressed, yet men swear by him in using indirect forms, as when they swear by the light of life, by the bread they eat, by their baptism, or any other pledges of the divine liberality towards them. Some erroneously suppose that our Saviour, in that passage, rebukes superstition, by forbidding men to swear by heaven and earth, and Jerusalem. He rather refutes the sophistical subtilty of those who thought it nothing vainly to utter indirect oaths, imagining that they thus spared the holy name of God, whereas that name is inscribed on each of his mercies. The case is different, when any mortal living or dead, or an angel, is substituted in the place of God, as in the vile form devised by flattery in heathen nations, “ By the life or genius of the king ”; for, in this case, the false apotheosis obscures and impairs the glory of the one God. But when nothing else is intended than to confirm what is said by an appeal to the holy name of God, although it is done indirectly, yet his majesty is insulted by all frivolous oaths. Christ strips this abuse of every vain pretext when he says “Swear not at all”. To the same effect is the passage in which James uses the words of our Saviour above quoted ( James 5:12 ). For this rash swearing has always prevailed in the world, notwithstanding that it is a profanation of the name of God. If you refer the words, “ not at all ”, to the act itself, as if every oath, without exception, were unlawful, what will be the use of the explanation which immediately follows—Neither by heaven, neither by the earth, &c.? These words make it clear, that the object in view was to meet the cavils by which the Jews thought they could extenuate their fault.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook