Matthew 5:33-37 — Oaths & Honesty

LINDA: Here is the question I think a normal person walks in with. Jesus says don't swear at all. And I'm sitting there going, wait, so is my whole life illegal now? Every time I say "I swear I'm not lying," every "I promise," every hand on the Bible in a courtroom? Is all of that off the table? Because that feels either impossible or kind of extreme.

FRANK: [warmly] It's a fair place to start, and honestly it's the reading most people land on first. Welcome to Dig Deeper, by the way, I'm Frank. Who's joining us?

LINDA: I'm Linda, glad you're here. Today we're in Matthew five, verses thirty-three to thirty-seven. Still up on that mountain, still in the Sermon on the Mount.

FRANK: The thick of the Sermon on the Mount, exactly. That question you asked earlier — "is my whole life illegal now" — hold onto it, because the passage answers it, but not in the direction you'd expect. Should I read it?

LINDA: Please.

FRANK: "Again you have heard that it was said to the ancient ones, 'You shall not make false vows, but shall perform to the Lord your vows,' but I tell you, don't swear at all: neither by heaven, for it is the throne of God; nor by the earth, for it is the footstool of his feet; nor by Jerusalem, for it is the city of the great King. Neither shall you swear by your head, for you can't make one hair white or black. But let your 'Yes' be 'Yes' and your 'No' be 'No.' Whatever is more than these is of the evil one."

LINDA: He lists specific things — by heaven, by earth, by Jerusalem, by your own head — instead of just saying "quit swearing" and moving on. Why the list?

FRANK: Because the list is the argument. And to feel it, you have to picture the game that was actually being played in the first century. This is the same "you have heard it said" move we walked through back on day five, where Jesus takes a rule everyone knows and drives underneath it. And underneath this one was a whole industry of graded oaths. Here's how it worked. A man wants to sound trustworthy, but he also wants a way out. So he learns a vocabulary. He swears "by Jerusalem," and the rabbis debated whether that one really held. He swears "by the temple" — a little tighter. He swears "by the gold of the temple," and now, the teachers said, now he's actually bound. You following the logic? The closer the oath got to naming God directly, the more it counted. Which means the further away it stayed, the more you could wriggle.

LINDA: The person swearing knew the whole time which words were the escape hatch.

FRANK: Precisely. It was a code. Both parties often knew it. You'd hear which formula somebody used and you'd know instantly how much of their word you could actually take to the bank.

LINDA: That's kind of horrifying when you say it that way. The oath wasn't there to make them more honest. It was a tool for measuring exactly how much honesty they owed you. Like, "I'll be truthful this far and no further, and here's the phrase that proves it."

FRANK: There's the fraud underneath it. Notice what that assumes. It assumes ordinary speech carries no obligation to be true at all. The very existence of a lesser oath tells you that your plain "yes" was considered worthless unless you dressed it up. That's the water they were swimming in.

LINDA: Okay but here's where I push. That's a first-century rabbi problem. Nobody I know is out here swearing "by the gold of the temple." So why does this land on me?

FRANK: Because you do it constantly, you've just changed the vocabulary. Think about it. When do you reach for "I swear to God" or "honestly" or "no, I'm serious, I promise you"? You reach for it in the exact moment you sense your plain word won't be believed. Which means you've quietly admitted the same thing they admitted — that your regular speech runs at a lower grade, and you keep a special reserve of truth for the sentences that really matter. That's the machinery. The words are different. The heart is identical.

LINDA: [quietly] I do that with my kids, actually. There's the normal "I'll be there," and then there's "no, I promise, I'll really be there this time," and the fact that I have a second gear at all kind of tells them the first gear is negotiable.

FRANK: That second gear is the tell. Now watch what Jesus does with the list, because this is where it turns from a rule into something enormous. He goes down the loopholes one at a time and closes each door. Swear by heaven? Heaven is God's throne — you just swore by God. Swear by earth? It's the footstool under his feet. By Jerusalem? The city of the great King. By your own head — your own body, the thing that feels most like it's just yours — and he says you can't even turn one hair white or black by your own will, so no, that belongs to him too. Do you see what he's done? He has gone looking for one neutral object in all of creation that you could swear by without dragging God in. And there isn't one. There is no corner of the universe far enough from God to be sworn by safely.

LINDA: Everything's the footstool. Everything's the throne. There's no back door because the whole house is his.

FRANK: The whole house is his. So the graded oath doesn't just fail, it was always an illusion. Every word you've ever spoken was already spoken in his hearing, whether you invoked his name or not.

LINDA: That brings me back to my very first question — is my whole life illegal now? The answer is actually the opposite of a new burden, isn't it?

FRANK: The opposite, yes, and this is the part I really want to land. Jesus is not tightening the vow law. He's not adding a stricter rule on top of the old one. He's closing the gap the old rule had been twisted to hide inside. The point isn't "swear more carefully." The point is that you don't need the crutch at all. Think about what an oath even is. An oath is a confession that your ordinary word can't be trusted, so you prop it up with a solemn formula. Jesus says: be the kind of person whose bare "yes" already carries the full weight of heaven, so that there is nothing left for an oath to do.

LINDA: He's not banning a bad word. He's after a kind of person who's so reliable the extra words become pointless.

FRANK: There's an old line from Matthew Henry that catches it perfectly. He says, "The worse men are, the less they are bound by oaths; the better they are, the less there is need for them." Sit on that for a second. A liar isn't held by an oath anyway. And a truthful person doesn't require one. So who exactly is the whole apparatus for? Nobody. It only ever served the man who wanted to look bound while staying free.

LINDA: That leads somewhere I want to chase. Because you can make this sound like just good manners. Be a person of your word, firm handshake, all that. But you keep saying "heaven," you keep saying "throne." Why is this a theology thing and not just a be-a-decent-human thing?

FRANK: Because of where truthfulness actually comes from. This isn't a technique Jesus is teaching. It's a family resemblance. Go back to Genesis one. "God said, let there be light, and there was light." Notice there's no gap there. God doesn't promise light, doesn't swear he'll produce light, doesn't guarantee it. He speaks, and reality obeys. His word simply is what happens. And then Balaam, of all people, hired to curse Israel, blurts out the truth instead: "God is not a man, that he should lie. Has he said, and will he not do it?" That's the God behind this command. A God who has never once needed an oath, because he has never once broken faith. And when Jesus tells you to let your yes be yes, he's not handing you a self-improvement tip. He's calling you to speak the way your Maker speaks — to be an image-bearer whose word, like his, just stands.

LINDA: The honesty is supposed to be a little echo of him. Every time my plain word holds, it looks like the God who said "light" and there was light.

FRANK: A small echo, exactly. And here's the beautiful complication — because Scripture will tell you God did swear an oath. Hebrews six. He swore by himself, it says, "that by two immutable things, in which it is impossible for God to lie, we may have strong encouragement." Now wait — didn't we just say he never needs one?

LINDA: Right, so which is it? That feels like a contradiction.

FRANK: It's a stoop. That's the word for it. God didn't swear because his word needed shoring up. He swore for us — he came down to our weakness, put his promise in the form we use for our most solemn commitments, so that a trembling person could have something rock-solid to hold. The oath isn't for his sake. It's a mercy toward ours. He speaks our nervous, oath-taking language so our confidence can rest on his faithfulness instead of on our own.

LINDA: [quietly] That gets me a little. He didn't have to, and he did it anyway, just so I'd feel held.

FRANK: And it goes one step further, right to the center of everything. Paul, in Second Corinthians one — he'd been accused of double-dealing, said he'd visit, plans changed, and his critics jumped on it: does this man say yes and no in the same breath? And listen to how he defends himself. He doesn't just say "trust me, I'm reliable." He says, "however many are the promises of God, in him" — in Christ — "is the Yes." Every promise God ever made, to Abraham, to David, through all the prophets, hung open for centuries, waiting. Then Christ came, and in him every single one snapped shut with a divine Yes. He didn't just speak God's yes. He is it. Jesus is the truthful word of God made flesh, the one whose Yes never wavers and never needed an oath to bind it.

LINDA: So when he tells me to be a person of one word, he's the proof it's even possible. He's the Yes I'm supposed to be a tiny copy of.

FRANK: You're a small participation in the character of the Christ who is himself the great Amen of God — the "so be it" spoken over every promise the Father ever made. Your plain honest speech isn't first a moral achievement. It's a family likeness.

LINDA: Alright. Bring it down into the week, because this is the part I actually have to go live. What does "let your yes be yes" do to me tomorrow morning?

FRANK: It listens for the moment you reach for the crutch. Someone doubts you, and you feel yourself grabbing for "honestly," or "I swear," or "I promise you this time." Drop it. Just say the thing, plainly, and let it stand. If you told a friend you'd call, call — and the call becomes the whole proof, no formula required. And here's the harder edge. At work, when your manager asks if it's done and it's ninety percent there, don't say "basically," don't say "just about." Say the real number. "It'll be finished by three." And then, brother — finish it by three. Jesus calls the padding and the hedging "of the evil one." A plain answer honors him more than an impressive one ever will.

LINDA: There's a flip side to that too, isn't there. Because I hedge just as much when I want to say no. Somebody asks me to cover a shift, take on the committee, and instead of a clean "no" I go "we'll see," "maybe," "let me check" — and I never check.

FRANK: And that "maybe" is unkind, even though it feels polite. You've left someone waiting on a yes that was never coming. A clear no today is a gift compared to a soft maybe that strings a person along for a month.

LINDA: Can I go somewhere heavier for a second, because this is the thing that actually caught me. The moment I take this seriously, all my dead promises start standing up. There's a bill I said I'd cover. A thing I committed to at church and quietly let die. There's an apology I promised somebody and then just... hoped they'd forget. Those aren't hypotheticals. I can see the names.

FRANK: Then you already know the shape of what's coming this week. You'll see the name light up your phone, or the person walks into the room, and your stomach tightens because you both remember what you said and never did. And the easy move is to talk about the weather and let that unpaid word rot for another month. Jesus won't let you call that peace. A follower of a truthful Lord can't sit on a stack of broken promises and pretend it's rest.

LINDA: So what's obedience actually look like there? Because "be more honest" is too vague to obey.

FRANK: It's smaller and harder than you'd think. You say, out loud, to the person: "I told you I'd do this, and I didn't. I was wrong. Here's when I'll make it right." And then you name a real date. No cushion of "I've just been so busy." Just the plain word, and then you make it good. That's it. And it'll cost you — pride doesn't die quietly. But you don't do it on willpower. The Christ who is the Yes of God paid your infinite debt at the cross first, and then he hands you the courage to go pay your small ones. He kept his word to you when it cost him everything. That's the ground you stand on to keep yours.

LINDA: [softly] He kept his word when it cost him everything. Okay.

FRANK: So let that be the thing you carry out the door. Not "try harder to be honest." That. Your salvation hangs on a Yes that God will never take back — and your little yes, made good this week, is you starting to look like him.

LINDA: So here's the one I'll leave you with, and I'm asking it of myself too. Who's the one person right now waiting on a promise from you that you could finally make good this week? You already know the name. Go make your yes a yes.

FRANK: Amen. Go do it today.

LINDA: This episode's part of the Dig Deeper app — if it's new to you, search Dig Deeper in your app store and come study with us.