Matthew 5:33
“Again you have heard that it was said to those of old, ‘You shall not swear falsely, but shall perform to the Lord what you have sworn.’
English Standard Version (ESV)
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The ancient teachers focused on avoiding direct perjury, but Jesus points out that swearing by created things—like heaven or earth—was just as easily a way to trivialize God. This reveals that the spirit of a command, not just the letter, matters deeply to God.
Jesus is now moving beyond prohibitions like murder and adultery to address the misuse of words. He's quoting a command from the Old Testament Law about not swearing falsely, but then he's about to correct the way religious leaders of his day were twisting this to allow casual, insincere oaths. This sets up his radical teaching that our "yes" should mean yes and our "no" should mean no, emphasizing complete integrity in speech.
Did God really only care about outright perjury? Or was there more to it?
Jesus is stepping into a complex religious landscape where the Law's commands about oaths were being narrowly interpreted. The Old Testament Law, found in places like Leviticus 19:12 and Deuteronomy 23:23, forbade swearing falsely and commanded faithfulness to oaths sworn to God. The religious leaders of Jesus' day had reduced this to a simple rule: don't commit outright perjury (swearing falsely by God's name). They developed intricate systems of 'binding' and 'non-binding' oaths, often swearing by created things like the heavens, the earth, or even one's own head, believing these were less serious and could be broken without consequence. Jesus is correcting this gross misunderstanding. He’s showing that the spirit of the law was about so much more than just avoiding the act of perjury. It was about honoring God’s name and upholding truth in all our dealings.
Jesus takes on a common loophole. If you didn't swear by God's name, was it okay to break it?
The core issue Jesus addresses is the casual, and even deceptive, way people were treating oaths. They created a false distinction: swearing directly by God's name carried weight, but swearing by 'the heavens' or 'the earth' was seen as a loophole, a way to make a promise without really being bound by God. Jesus shatters this illusion. He explains that swearing by any created thing is, in essence, swearing by the Creator. 'Heaven is my throne,' God says, and 'the earth is my footstool.' When you swear by them, you're invoking God's authority and judgment, whether you realize it or not. This teaching wasn't about abolishing oaths altogether, especially those taken in judicial settings or for solemn confirmation. Instead, Jesus was condemning the lazy, common, and often insincere habit of making casual oaths that lacked the reverence and commitment they deserved, especially when they were used to circumvent truthfulness.
What's the radical alternative Jesus offers to the whole system of oaths?
Understand the original words
epiorkeō · Greek Verb
To commit perjury or to swear an oath with the intent to deceive; failing to keep a promise made under oath.
apodidōmi · Greek Verb
To give back, render, or fulfill an obligation; specifically, to carry out a vow or promise made to God.
kyrios · Greek Noun
A title of supreme authority and sovereignty, identifying God as the Master and Ruler to whom all allegiance is due.
horkos · Greek Noun
A solemn pledge, vow, or oath taken to confirm the truth of a statement or the certainty of a promise.
This teaching directly counters the casuistry of the day, where religious leaders had created a system of oaths that distinguished between 'binding' and 'non-binding' vows, often leading to hypocrisy. Jesus calls for a return to integrity, where all speech is truthful and oaths, when used, are always serious appeals to God's truth.
c. 1450 BC
Ten Commandments Given
The prohibition against taking God's name in vain, which includes false oaths, is given to Israel at Mount Sinai as part of the foundational Law.
c. 1400-1000 BC
Oaths Regulated in Mosaic Law
Laws are given regarding oaths, distinguishing between different types and specifying the need to perform what is sworn, particularly in relation to God. Examples include Leviticus 19:12 and Deuteronomy 23:23.
c. 400 BC - 1st Century AD
Development of Rabbinic Oral Tradition
During the Second Temple period and beyond, Jewish rabbis developed extensive interpretations of the Law. This included complex rulings on oaths, often focusing on the specific words used rather than the intent, leading to loopholes and a lessening of reverence for God's name.
c. AD 30-33— this verse
Jesus' Sermon on the Mount
This passage contains the direct Old Testament command that Jesus is referencing, prohibiting swearing falsely and thereby profaning God's name.
Deuteronomy 23:23This verse further elaborates on the command to perform what has been vowed or sworn to the Lord, providing the second part of the principle Jesus is discussing.
James 5:12The Apostle James echoes Jesus' teaching here, directly quoting 'Let your 'Yes' be 'Yes' and your 'No' be 'No',' emphasizing the importance of simple truthfulness over oaths.
Matthew 23:16-22In this passage, Jesus confronts the Pharisees on similar teachings, exposing their faulty logic regarding oaths sworn by the temple or by heaven, further illustrating the abuse He is correcting.
barnesMatthew 5:33: "Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:"
Thou shalt not forswear thyself - Christ here proceeds to correct another false interpretation of the law. The law respecting oaths is found in Leviticus 19:12 , and Deuteronomy 23:23 . By those laws people were forbid to perjure themselves, or to forswear, that is, swear falsely. Perform unto the Lord - Perform literally, really, and rel…
calvinMatthew 5:33-37: "Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:"
- Again, ye have heard that it was said to the ancients, Thou shalt not perjure thyself: but thou shalt perform to the Lord what thou hast sworn. 34. But I charge you, swear not at all: neither by heaven, for it is the throne of God: 35. Nor by the earth, for it is his footstool: nor by Jerusalem, for it is the city of the great King…
The ancient teachers focused on avoiding direct perjury, but Jesus points out that swearing by created things—like heaven or earth—was just as easily a way to trivialize God. This reveals that the spirit of a command, not just the letter, matters deeply to God.
Jesus is now moving beyond prohibitions like murder and adultery to address the misuse of words. He's quoting a command from the Old Testament Law about not swearing falsely, but then he's about to correct the way religious leaders of his day were twisting this to allow casual, insincere oaths. This sets up his radical teaching that our "yes" should mean yes and our "no" should mean no, emphasizing complete integrity in speech.
Jesus is now moving beyond prohibitions like murder and adultery to address the misuse of words. He's quoting a command from the Old Testament Law about not swearing falsely, but then he's about to correct the way religious leaders of his day were twisting this to allow casual, insincere oaths. This sets up his radical teaching that our "yes" should mean yes and our "no" should mean no, emphasizing complete integrity in speech.
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Jesus doesn't just point out the problem; he provides the solution. The most straightforward interpretation of 'Swear not at all' in this context is a call to radical honesty in everyday speech. Instead of relying on oaths to prove sincerity, Jesus wants our default mode to be simple truthfulness. 'Let your speech be, 'Yes, yes,' and 'No, no.’’ This isn't just about being truthful; it's about living in such a way that your word is your bond. When your 'yes' is reliably 'yes' and your 'no' is reliably 'no,' people can trust you without needing a solemn oath. This principle gets to the root of the issue: the prevalence of falsehood and dishonesty in society necessitates oaths. Jesus calls us to a higher standard, where our character and consistent truthfulness make unnecessary oaths obsolete. What is beyond this simple affirmation or denial, Jesus says, 'comes from evil' – it springs from a world where trust is broken and deception is common.
Jesus delivers his most famous discourse, addressing and correcting the flawed interpretations of the Law prevalent among the Jewish religious leaders and populace, including the misuse of oaths.
c. AD 30-33
Jesus' Teachings on Oaths
In his Sermon on the Mount, Jesus contrasts the superficial rabbinic understanding of oaths with a higher standard of truthfulness, teaching that oaths are binding and that simple, honest speech ('Yes, yes; No, no') is the ideal.
"“Again you have heard that it was said to those of old, ‘You shall not swear falsely, but shall perform to the Lord what you have sworn.’" — The ancient teachers focused on avoiding direct perjury, but Jesus points out that swearing by created things—like heaven or earth—was just as easily a way to trivialize God. This reveals that the sp…
