What Does Dunamis Mean? The Greek Word Behind 'Power' in the Bible

"But you will receive power when the Holy Spirit has come upon you."

Acts 1:8. Jesus says it to a room full of confused disciples right before He disappears into the sky. They have just watched their teacher die, come back, and now leave again, and the parting promise is power. What kind of power, exactly? Power to do what?

If you've sat through enough sermons, you have probably heard the line: "The Greek word here is dunamis, where we get dynamite." Pastor leans on the pulpit. Pause for effect. Holy Spirit dynamite.

The line works because it sounds explosive. It also gets the history backwards.

The "Dynamite" Sermon Illustration Is Backwards

Dynamite was invented in 1867 by Alfred Nobel. He needed a name for his new explosive, so he reached for an ancient Greek word that already existed and borrowed it. Dunamis predates dynamite by roughly two thousand years. Paul did not write Romans 1:16 thinking about TNT. The disciples in Acts 1 did not hear "power" and picture a stick of fuse-lit destruction. They couldn't have. The category didn't exist yet.

This matters more than it sounds. The illustration trains people to read dunamis as a sudden, violent, explosive force. Something dramatic that happens to you and around you. A blast. But that's not what the word meant when the New Testament writers were using it. The English word that inherited the name has nothing to do with the meaning of the original.

So what did dunamis actually mean?

Dunamis: Inherent Ability, Not Explosive Force

Dunamis (δύναμις, pronounced DOO-nah-mis) shows up about 120 times across the New Testament. The exact count depends on which manuscript tradition you're using, but most concordances land between 119 and 120 occurrences. It's translated as power, ability, might, strength, miracle, mighty work, and meaning, depending on the context. The KJV often renders it "miracle." The ESV usually goes with "power." Most modern translations swap between several English words and lose the fact that it's the same Greek term underneath.

The root tells you almost everything you need to know. Dunamis comes from the verb dunamai, which means "to be able." Just that. To have the capacity. To possess the ability to do a thing. The noun form, dunamis, is the inherent capability that lets the verb happen.

It's the word a Greek speaker would use for the strength in a soldier's arm, the potency of a medicine, the capability of an army, or the talent of a craftsman. Plato uses dunamis in The Republic to describe the power of sight, the capacity of an eye to see. Xenophon uses it in his military histories for the strength of an army. In Aristotle's philosophical writing, dunamis is the technical term for potential, what something is capable of becoming, as opposed to its actualized state. A seed has the dunamis to become a tree. A student has the dunamis to become a teacher. The capability is real even before it's expressed.

The Septuagint, the Greek translation of the Hebrew Old Testament that the New Testament writers were reading, uses dunamis to render Hebrew words like khayil (strength, valor, army) and gibbor (mighty one). When Paul reaches for dunamis in Romans, he isn't pulling from the world of Roman military explosives. He's pulling from a word that had been carrying the weight of Old Testament strength and capability for at least two hundred years before he picked up a pen.

That's the word Luke uses when the angel tells Mary, "The Holy Spirit will come upon you, and the power of the Most High will overshadow you" (Luke 1:35). Not explosive force. The very capability of God, settling on a Galilean teenager and accomplishing what she could not do on her own.

Five Places Dunamis Carries the Weight

Once you start watching for the word, you see how much of the New Testament rests on it.

Luke 1:35 is the first major use. Gabriel tells Mary that the conception of Jesus will happen by the dunamis of the Most High. The same word that will later describe miracles is here describing the most quiet miracle of all, a child forming in a womb without a human father. Capability. Not pyrotechnics.

Acts 1:8, the verse that started this. Jesus uses dunamis as a noun in the accusative case, the direct object of "receive." The disciples will receive a thing called power, and then they will be witnesses. The power is not the witnessing itself, it's what makes the witnessing possible. Capacity precedes action.

Romans 1:16 is where Paul makes his thesis statement for the whole letter. "I am not ashamed of the gospel, for it is the dunamis of God for salvation to everyone who believes." The gospel is the power of God. Not a power play. Not a forceful argument. The actual capability of God to save people, embedded in a message about a Jewish carpenter who got executed. Paul is saying the news itself carries the capacity.

1 Corinthians 1:18 doubles down. "The word of the cross is folly to those who are perishing, but to us who are being saved it is the dunamis of God." The cross looks like weakness from the outside. A Roman execution device, a humiliated rabbi, a public failure. Paul calls it the capability of God. The thing that looks least like power is actually where the power lives.

What I Still Wrestle With (Jay Scott)

2 Corinthians 12:9 is the one that has kept me thinking for years. Paul is begging God to remove his "thorn in the flesh," whatever that was, and the answer he gets is: "My dunamis is made perfect in weakness." The power of God reaches its fullest expression precisely where Paul is at his most depleted. Capability flowing into a vessel that has run out of its own.

I don't have a clean answer for what Paul's thorn was. Scholars have guessed at everything from a chronic illness to a recurring temptation to a specific opponent. What I do know is that the word he uses for what he received in exchange for healing is dunamis. Capacity. Not removal of the problem, but capacity to keep going inside it.

A Better Analogy Than Dynamite

If dynamite is the wrong picture, what's the right one?

Try electrical current in a wire.

The current is present. It flows through the wire from a source the wire didn't generate. The wire doesn't manufacture the electricity. It carries it. When the current is flowing, the wire can do things, light a bulb, turn a motor, run a machine, that the wire could not do on its own. Cut the wire off from the source and it's just a piece of copper. Hook it up and it becomes useful in a way that has nothing to do with what the wire is made of.

That's closer to dunamis than dynamite ever was.

When Jesus tells the disciples they will receive dunamis, He's not promising an explosion. He's promising a connection. The Holy Spirit will be the source. The disciples will be the wire. The capability that comes through them won't be theirs in the way their personalities or skills are theirs. It will pass through them from somewhere else, and they will accomplish things they could not have produced by their own effort.

That's also why "power made perfect in weakness" works as a sentence. A frayed, half-broken, exhausted wire can still carry current if it's hooked up. Sometimes the weaker the wire, the more obvious the source.

What "Receive Power" Actually Asks of You

If dunamis is capacity and not feeling, that changes what it means to ask for it.

Most of us, when we pray for the power of God, are asking for an experience. Goosebumps. Confidence. A sense that something is happening. We want the explosion. We want to feel different. The dynamite illustration trained us for this. We expect dunamis to be loud.

But the disciples in Acts didn't receive a feeling. They received a capability. Peter, who had denied Jesus three times in a courtyard, ended up preaching to a crowd of thousands on Pentecost. The thing that changed wasn't his personality. He was still the same impulsive fisherman a few weeks later when Paul had to confront him about hypocrisy in Galatians 2. What changed was the connection. He had been hooked up to a source he was not capable of being on his own.

That's the practical implication. Receiving dunamis is not about feeling powerful. It's about being available to a source. It's the difference between trying to muster strength from your own reserves and letting Someone else's strength flow through you while you're empty.

Service stops being about effort and starts being about presence. Prayer stops being about persuading God and starts being about staying connected to the current. Witness stops being about saying the right thing and starts being about being a wire that doesn't get in the way of what wants to come through.

I'll be honest: I'm not very good at this. I keep trying to generate my own dunamis. I keep forgetting that the word doesn't mean what dynamite means. But every once in a while, when I'm flat out of my own capacity, something happens that I know I didn't produce. Those moments are the only ones where Acts 1:8 stops being a verse and starts being a description.

How To Read Verses With "Power" In Them

Next time your Bible says "power," check whether it's dunamis underneath. (In the New Testament, most of the time, it is.) Then ask:

Is this capability, not explosion?
Is it flowing through someone, or being generated by them?
What can't be done without it?

I worked through most of the 120 occurrences using the biblical language word study tool in Sola, which lets you stack every instance next to its context and case. Seeing them all in one place was what finally killed the dynamite illustration for me. The word just doesn't do what English speakers want it to do.

So What Does Dunamis Mean

Not an explosion. Not a feeling. Not a personality trait you grow into.

Dunamis is inherent capability, sourced outside of you, flowing through you to accomplish what you could not do on your own. It's the capacity in the wire when the current is on. It's what the angel told Mary would overshadow her. It's what Jesus said the disciples would receive. It's what Paul said his weakness was perfect for.

Acts 1:8 stops being a slogan when you read it that way. You will receive capacity. You will be hooked up. The thing you couldn't manufacture is going to be available to you, because Someone else generates it.

That's the word. That's why it shows up 120 times.