Matthew 5:35

non occ.: The Lord has hitherto taught to abstain from injuring our neighbour, forbidding anger with murder, lust with adultery, and the putting away a wife with a bill of divorce. He now proceeds to teach to abstain from injury to God, forbidding not only perjury as an evil in itself, but even all oaths as the cause of evil, saying, "Ye have heard it said by them of old, Thou shalt not forswear thyself." It is written in Leviticus, "Thou shalt not forswear thyself in my name;" [Lev 19:12] and that they should not make gods of the creature, they are commanded to render to God their oaths, and not to swear by any creature, "Render to the Lord thy oaths;" that is, if you shall have occasion to swear, you shall swear by the Creator and not by the creature. As it is written in Deuteronomy, "Thou shalt fear the Lord thy God, and shalt swear by his name." [Deut 6:13]

This was allowed under the Law, as to children; as they offered sacrifice to God, that they might not do it to idols, so they were permitted to swear by God; not that the thing was right, but that it were better done to God than to daemons.

For no man can swear often, but he must sometimes forswear himself; as he who has a custom of much speaking will sometimes speak foolishly.

Inasmuch as the sin of perjury is a grievous sin, he must be further removed from it who uses no oath, than he who is ready to swear on every occasion, and the Lord would rather that we should not swear and keep close to the truth, than that swearing we should come near to perjury.

This precept also confirms the righteousness of the Pharisees, not to forswear; inasmuch as he who swears not at all cannot forswear himself. But as to call God to witness is to swear, does not the Apostle break this commandment when he says several times to the Galatians, "The things which I write unto you, behold, before God, I lie not." [Gal 1:20] So the Romans, "God is my witness, whom I serve in my spirit." [Rom 1:9] Unless perhaps some one may say, it is no oath unless I use the form of swearing by some object; and that the Apostle did not swear in saying, "God is my witness." It is ridiculous to make such a distinction; yet the Apostle has used even this form, "I die daily, by your boasting." [1 Cor 15:31] That this does not mean, your boasting has caused my dying daily, but is an oath, is clear from the Greek, which is.

But what we could not understand by mere words, from the conduct of the saints we may gather in what sense should be understood what might easily be drawn the contrary way, unless explained by example. The Apostle has used oaths in his Epistles, and by this shews us how that ought to be taken, "I say unto you, Swear not at all," namely, lest by allowing ourselves to swear at all we come to readiness in swearing, from readiness we come to a habit of swearing, and from a habit of swearing we fall into perjury. And so the Apostle is not found to have used an oath but only in writing, the greater thought and caution which that requires not allowing of slip of the tongue. Yet is the Lord's command so universal, "Swear not at all," that He would seem to have forbidden it even in writing. But since it would be an impiety to accuse Paul of having violated this precept, especially in his Epistles, we must understand the word "at all" as implying that, as far as lays in your power, you should not make a practice of swearing, not aim at it as a good thing in which you should take delight.

Therefore in his writings, as writing allows of greater circumspection, the Apostle is found to have used an oath in several places, that none might suppose that there is any direct sin in swearing what is true; but only that our weak hearts are better preserved from perjury by abstaining from all swearing whatever.

Lastly, consider that the Saviour does not here forbid to swear by God, but by the Heaven, the Earth, by Jerusalem, by a man's head. For this evil practice of swearing by the elements the Jews had always, and are thereof often accused in the prophetic writings. For he who swears, shew either reverence or love for that by which he swears. Thus when the Jews swore by the Angels, by the city of Jerusalem, by the temple and the elements, they paid to the creature the honour and worship belonging to God; for it is commanded in the Law that we should not swear but by the Lord our God.

Or; It is added, "By the Heaven, &c." because the Jews did not consider themselves bound when they swore by such things. As if He had said, When you swear by the Heaven and the Earth, think not that you do not owe your oath to the Lord your God, for you are proved to have sworn by Him whose throne the heaven is, and the earth His footstool; which is not meant as though God had such limbs set upon the heaven and the earth, after the manner of a man who is sitting; but that seat signifies God's judgment of us. And since in the whole extent of this universe it is the heaven that has the highest beauty, God is said to sit upon the heavens as shewing divine power to be more excellent than the most surpassing show of beauty; and He is said to stand upon the earth, as putting to lowest use a lesser beauty. Spiritually by the heavens are denoted holy souls, by the earth the sinful, seeing "He that is spiritual judgeth all things." [1 Cor 2:15] But to the sinner it is said, "Earth thou art, and unto earth thou shalt return." [Gen 3:19] And he who would abide under a law, is put under a law, and therefore He adds, "it is the footstool of His feet. Neither by Jerusalem, for it is the city of the Great King;" this is better said than "it is mine;" though it is understood to mean the same. And because He is also truly Lord, whoso swears by Jerusalem, owes his oath to the Lord. "Neither by thy head." What could any think more entirely his own property than his own head? But how is it ours when we have not power to make one hair black or white? Whoso then swears by his own head also owes his vows to the Lord; and by this the rest may be understood.

Note how He exalts the elements of the world, not from their own nature, but from the respect which they have to God, so that there is opened no occasion of idolatry.

Having forbidden swearing, He instructs us how we ought to speak, "Let your speech be yea, yea; nay, nay." That is, to affirm any thing it is sufficient to say, "It is so;" to deny, to say, "It is not so." Or, "yea, yea; nay, nay," are therefore twice repeated, that what you affirm with the mouth you should prove in deed, and what you deny in word, you should not establish by your conduct.

Otherwise; They who live in the simplicity of the faith have not need to swear, with them ever, what is is, what is not is not; by this their life and their conversation are ever preserved in truth.

Therefore Evangelic verity does not admit an oath, since the whole discourse of the faithful is instead of an oath.

And he who has learned that an oath is to be reckoned not among things good, but among things necessary, will restrain himself as much as he may, not to use an oath without necessity, unless he sees men loth to believe what it is for their good they should believe, without the confirmation of an oath. This then is good and to be desired, that our conversation be only, "yea, yea; nay, nay; for what is more than this cometh of evil." That is, if you are compelled to swear, you know that it is by the necessity of their weakness to whom you would persuade any thing; which weakness is surely an evil. What is more than this is thus evil; not that you do evil in this just use of an oath to persuade another to something beneficial for him; but it is an evil in him whose weakness thus obliges you to use an oath.

Or; "of evil," that is, from their weakness to whom the Law permitted the use of an oath. Not that by this the old Law is signified to be from the Devil, but He leads us from the old imperfection to the new abundance.

1. Further, also, concerning Jerusalem and the Lord, they venture to assert that, if it had been “the city of the great King,” it would not have been deserted. This is just as if any one should say, that if straw were a creation of God, it would never part company with the wheat; and that the vine twigs, if made by God, never would be lopped away and deprived of the clusters. But as these [vine twigs] have not been originally made for their own sake, but for that of the fruit growing upon them, which being come to maturity and taken away, they are left behind, and those which do not conduce to fructification are lopped off altogether; so also [was it with] Jerusalem, which had in herself borne the yoke of bondage (under which man was reduced, who in former times was not subject to God when death was reigning, and being subdued, became a fit subject for liberty), when the fruit of liberty …

If we think over the rest of faults, tracing them from their generations, let us begin with covetousness, “a root of all evils,” wherewith, indeed, some having been ensnared, “have suffered shipwreck about faith.” Albeit covetousness is by the same apostle called idolatry . In the next place proceeding to mendacity, the minister of covetousness (of false swearing I am silent, since even swearing is not lawful), is trade adapted for a servant of God? But, covetousness apart, what is the motive for acquiring? When the motive for acquiring ceases, there will be no necessity for trading. Grant now that there be some righteousness in business, secure from the duty of watchfulness against covetousness and mendacity; I take it that that trade which pertains to the very soul and spirit of idols, which pampers every demon, falls under the charge of idolatry. …

1. Having now briefly arranged these points in order as we best could, it follows that, agreeably to our intention from the first, we refute those who think that the Father of our Lord Jesus Christ is a different God from Him who gave the answers of the law to Moses, or commissioned the prophets, who is the God of our fathers, Abraham, Isaac, and Jacob. For in this article of faith, first of all, we must be firmly grounded. We have to consider, then, the expression of frequent recurrence in the Gospels, and subjoined to all the acts of our Lord and Saviour, “that it might be fulfilled which was spoken by this or that prophet,” it being manifest that the prophets are the prophets of that God who made the world. From this therefore we draw the conclusion, that He who sent the prophets, Himself predicted what was to be foretold of Christ. …

XIII. But here, as in port, putting in the vessel that bears the ensign of the cross, let us reef the sails of our oration, in order that it may be with itself commensurate. Only first, in as few words as possible, let us salute the city of the Great King together with the whole body of the Church, as being present with them in spirit, and keeping holy-day with the Father, and the brethren most held in honour there. Hail, thou city of the Great King, in which the mysteries of our salvation are consummated. Hail, thou heaven upon earth, Sion, the city that is for ever faithful unto the Lord. …

But Heracleon declares the words, “There standeth one among you,” to be equivalent to “He is already here, and He is in the world and in men, and He is already manifest to you all.” By this He does away with the meaning which is also present in the words, that the Word had permeated the whole world. For we must say to him, When is He not present, and when is He not in the world? Does not this Gospel say, “He was in the world, and the world was made by Him, and the world knew Him not.” And this is why those to whom the Logos is He “whom you know not,” do not know Him: they have never gone out of the world, but the world does not know Him. …

We shall, however, expound according to the strength that is given to us the reasons which move us to recognize here a harmony; and in doing so we entreat Him who gives to every one that asks and strives acutely to enquire, and we knock that by the keys of higher knowledge the hidden things of Scripture may be opened to us. And first, let us fix our attention on the words of John, beginning, “And Jesus went up to Jerusalem.” Now Jerusalem, as the Lord Himself teaches in the Gospel according to Matthew, “is the city of the great King.” It does not lie in a depression, or in a low situation, but is built on a high mountain, and there are mountains round about it, and the participation of it is to the same place, and thither the tribes of the Lord went up, a testimony for Israel. …

3. As "the law and the prophets" may have three different meanings, it is uncertain in what sense the words are used by Jesus, though we may form a conjecture from what follows. For if Jesus had gone on to speak of circumcision, and Sabbaths, and sacrifices, and the observances of the Hebrews, and had added something as a fulfillment, there could have been no doubt that it was the law and the prophets of the Jews of which He said that He came not to destroy, but to fulfill them. But Christ, without any allusion to these, speaks only of commandments which date from the earliest times: "Thou shall not kill; Thou shalt not commit adultery; Thou shalt not bear false witness." These, it can be proved, were of old promulgated in the world by Enoch and Seth, and the other righteous men, to whom the precepts were delivered by angels of lofty rank, in order to tame the savage nature of men. …

32. Here, therefore, the prayer is not, that we should not be tempted, but that we should not be brought into temptation: as if, were it necessary that any one should be examined by fire, he should pray, not that he should not be touched by the fire, but that he should not be consumed. For “the furnace proveth the potter’s vessels, and the trial of tribulation righteous men.” Joseph therefore was tempted with the allurement of debauchery, but he was not brought into temptation. Susanna was tempted, but she was not led or brought into temptation; and many others of both sexes: but Job most of all, in regard to whose admirable stedfastness in the Lord his God, those heretical enemies of the Old Testament, when they wish to mock at it with sacrilegious mouth, brandish this above other weapons, that Satan begged that he should be tempted. …

5. But in order that we may not by saying everything at once to-day, confuse your minds, we put before you one custom, namely, about the avoidance of oaths, saying this much by way of preface, and speaking plainly, that if you do not avoid oaths, I say not perjury merely, but those too which happen in the cause of justice, we shall not further discourse upon any other subject. For it is monstrous that teachers of letters should not give a second lesson to their children until they see the former one fixed well in their memory, but that we, without being able to express our first lessons clearly, should inculcate others before the first are completed. For this is nothing else than to pour into a perforated jar. Give great care, then, that ye silence not our mouth. …

Which accordingly He doth here also; for through so many words as He hath spent He ceases not to set Him before us, admiring His wisdom, His providence, His tender care extending through all things, both great and small. Thus, both when He was speaking of Jerusalem, He called it “the city of the Great King;”and when He mentioned Heaven, He spake of it again as “God’s throne;”and when He was discoursing of His economy in the world, to Him again He attributes it all, saying, “He maketh His sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.” And in the prayer too He taught us to say, His “is the kingdom and the power and the glory.” And here in discoursing of His providence, and signifying how even in little things He is the most excellent of artists, He saith, that “He clothes the grass of the field.” And nowhere doth He call Him His own Father, but th …

7. Evidently this description cannot be taken literally (in fact, it is absurd to suppose a city the length, breadth and height of which are all twelve thousand furlongs), and therefore the details of it must be mystically understood. The great city which Cain first built and called after his son must be taken to represent this world, which the devil, that accuser of his brethren, that fratricide who is doomed to perish, has built of vice cemented with crime, and filled with iniquity. Therefore it is spiritually called Sodom and Egypt. Thus it is written, “Sodom shall return to her former estate,” that is to say, the world must be restored as it has been before. For we cannot believe that Sodom and Gomorrah, Admah and Zeboim are to be built again: they must be left to lie in ashes forever. We never read of Egypt as put for Jerusalem: it always stands for this world. …