But above all things, my brethren, swear not, neither by heaven, nor by the earth, nor by any other oath. But let your speech be, yea, yea: no, no: that you fall not under judgment.

“What if someone swears an oath and claims that he was forced to do so? The fear of God is more powerful than any force. For though you may start out by swearing all kinds of promises, you will not keep any of them. Moreover, you would not dare to swear or give an oath in matters of human law, which you accept whether you want to or not. You would certainly never claim that you were forced into doing so. Now the person who has heard the blessings of God and who has prepared himself as Christ has commanded will never claim any need to do anything of the kind, for he is respected and honored by all. What is needed beyond a simple yes and no? An oath adds nothing to these, for no one has to be told that evil is the source of both excess and its deficient opposite. An oath is a form of excess.”

“But above all things, my brethren, swear not,.... As impatience should not show itself in secret sighs, groans, murmurings, and repinings, so more especially it should not break forth in rash oaths, or in profane swearing; for of such sort of swearing, and of such oaths, is the apostle to be understood; otherwise an oath is very lawful, when taken in the fear and name of God, and made by the living God, and is used for the confirmation of anything of moment, and in order to put an end to strife; God himself, and the Lord Jesus Christ, and angels, and good men, are in Scripture sometimes represented as swearing: and that the apostle is so to be understood, appears from the form of swearing prohibited, neither by the heaven, neither by the earth, neither by any other oath; of the like kind; such as are forbidden, and cautioned, and reasoned against by our Lord, in Mat 5:34 to which the apostle manifestly refers; See Gill on Mat 5:34, Mat 5:35, Mat 5:36. But let your yea be yea, and your nay, nay; that is, whenever there is an occasion for affirming, or denying anything, let it be done nakedly, simply, and absolutely, without any form of oath annexed to it; for whatever addition of that kind is made comes from evil, and tends to it, and is evil: lest ye fall into condemnation; by the Lord; for either false, or rash, or profane swearing; for he will not suffer it to go unpunished; see Exo 20:7. Some copies read, "lest ye fall into hypocrisy"; or dissimulation, and get into a habit and custom of lying and deceiving, as common swearers do; and so reads the Arabic version.”

“Above all things - swear not - What relation this exhortation can have to the subject in question, I confess I cannot see. It may not have been designed to stand in any connection, but to be a separate piece of advice, as in the several cases which immediately follow. That the Jews were notoriously guilty of common swearing is allowed on all hands; and that swearing by heaven, earth, Jerusalem, the temple, the altar, different parts of the body, was not considered by them as binding oaths, has been sufficiently proved. Rabbi Akiba taught that "a man might swear with his lips, and annul it in his heart; and then the oath was not binding." See the notes on Mat 5:33, etc., where the subject is considered in great detail. Let your yea be yea, etc. - Do not pretend to say yea with your lips, and annul it in your heart; let the yea or the nay which you express be bona fide such. Do not imagine that any mental reservation can cancel any such expressions of obligation in the sight of God. Lest ye fall into condemnation - Ἱνα μη ὑπο κρισιν πεσητε· Lest ye fall under judgment. Several MSS. join ὑπο and κρισιν together, ὑποκρισιν, and prefix εις, into, which makes a widely different reading: Lest ye fall into hypocrisy. Now, as it is a fact, that the Jews did teach that there might be mental reservation, that would annul the oath, how solemnly soever it was taken; the object of St. James, if the last reading be genuine, and it is supported by a great number of excellent MSS., some versions, and some of the most eminent of the fathers, was to guard against that hypocritical method of taking an oath, which is subversive of all moral feeling, and must make conscience itself callous.”

“But above all things….swear not, &c. This earnest admonition is against all kind of oaths in common conversation, (not against oaths made on just and necessary occasions) and in the very same words, as our blessed Saviour warned all people against this sin of swearing. (Matthew, chap. v.) How unaccountably is this commandment of God contemned? And what a dreadful account will some day be exacted for so many oaths, curses, and blasphemies, which are now so common, that we may rather wonder at the patience of God and that already exemplary punishments have not fallen upon whole cities and kingdoms for this continued profanation of the holy name of God? (Witham) — St. James here repeats the injunctions of our Saviour, not to swear al all. (Matthew v. 34.) See the annotations in that place.”

“But above all--as swearing is utterly alien to the Christian meek "endurance" just recommended. swear not--through impatience, to which trials may tempt you (Jam 5:10-11). In contrast to this stands the proper use of the tongue, Jam 5:13. James here refers to Mat 5:34, &c. let your yea be yea--Do not use oaths in your everyday conversation, but let a simple affirmative or denial be deemed enough to establish your word. condemnation--literally, "judgment," namely, of "the Judge" who "standeth before the doors" (Jam 5:9).”