What does Zechariah 4:6 mean by “not by might, nor by power”?

Question 4133

The words “not by might, nor by power, but by my Spirit, says the Lord of hosts” come from Zechariah 4:6, and they were spoken to a discouraged man facing a task far beyond his resources. The phrase “not by might” has become a favourite verse, often quoted with little thought for its setting, yet when we read it in context it becomes one of the clearest statements in the Old Testament about how the work of God is actually accomplished. It is done by His Spirit, not by human strength.

To feel the weight of the promise we need to know who was meant to hear it, what he was facing, and why God chose this moment to remind His servant that the work would advance by the Spirit and not by force of arms or human ability.

The setting of “not by might”

Zechariah prophesied after the exile, among the remnant who had returned to Jerusalem to rebuild the temple. The man at the centre of these words is Zerubbabel, the governor of Judah, on whose shoulders the rebuilding rested. The foundation had been laid, but the work had stalled. Opposition from surrounding peoples, discouragement, and the sheer smallness of the returned community had brought the project to a standstill. The people had grown weary, and the temple stood unfinished.

Into this discouragement Zechariah is given a vision of a golden lampstand fed by two olive trees, supplied with oil without human hands ever touching it. When he asks what it means, the angel gives the answer that interprets the whole scene: “This is the word of the Lord to Zerubbabel: Not by might, nor by power, but by my Spirit, says the Lord of hosts” (Zechariah 4:6). The endless supply of oil pictures the endless supply of the Spirit, by whom the work would be carried through to completion.

What “might” and “power” mean here

The two words God sets aside are worth weighing. The first, often translated “might”, refers to collective human strength, the resources of an army or a community, sheer numbers and force. The second, “power”, points to individual strength, personal ability and energy. Together they cover the whole range of what people naturally rely on to get things done, from organised manpower to private talent. God says the temple will not be finished by either of these.

This was a hard word for a small and weakened people. They had every reason to think the work depended on resources they plainly lacked. They were few, poor, surrounded by enemies, and far from the glory of the day of Solomon. To be told “not by might, nor by power” might have sounded like a counsel of despair, except for the words that follow. The work would go forward, but by the Spirit of the Lord of hosts, whose resources are never exhausted.

Not by might, but by the Spirit

The promise is not that human effort is unnecessary. Zerubbabel still had to organise the labour and the people still had to lift the stones. The point is that the decisive power, the energy that would actually bring the work to completion against all opposition, was the Spirit of God and not the strength of men. The same Spirit who came upon craftsmen to build the tabernacle and upon leaders to deliver Israel would carry this work through.

We see the same principle running through Scripture. The Lord told Gideon to reduce his army so that Israel could not boast that her own hand had saved her. Paul reminded the Corinthians that God chose the weak things of the world to shame the strong, so that no human being might boast in His presence. The pattern is consistent, and Zechariah 4:6 states it in its purest form. God works by His Spirit so that the glory belongs to Him. This is why the same Spirit who empowered the prophets continues to empower the church, a continuity we explore in our study of the Spirit in the Old and New Testaments and in the Spirit before Pentecost.

Zechariah goes on to add a word about the mountain of obstacles before Zerubbabel: “Who are you, O great mountain? Before Zerubbabel you shall become a plain” (Zechariah 4:7). The obstacle that looked immovable would be levelled, not by the cleverness of the governor but by the Spirit who was behind the whole enterprise. And the chapter promises that the hands that laid the foundation would also complete it, so that no one need despise the day of small things (Zechariah 4:10).

The day of small things

That phrase, “the day of small things”, speaks directly to anyone tempted to measure the work of God by visible scale. The returned remnant was small, their temple modest compared with the first, their prospects unimpressive. Yet God told them not to despise the small beginning, because the Spirit was at work in it. The size of the means is no measure of the size of what God will do through them, since the power is His and not ours.

This is a steadying word for the church in every age, and especially for the believer who feels too weak or too ordinary to be of use. The principle of “not by might” frees us from the tyranny of impressive resources. A small congregation, a quiet act of faithfulness, a single life surrendered to God, these are exactly the kind of small things through which the Spirit delights to accomplish what the mighty and the powerful could never achieve.

How “not by might” shapes our praying and serving

If the work is done by the Spirit and not by human strength, then prayer cannot be an afterthought tacked on to a plan we have already settled. The lesson of “not by might” is that we begin on our knees, seeking the supply of the Spirit before we lift a finger, because the oil for the lamp comes from God. A church that plans elaborately and prays little has, whatever it may say with its lips, decided in practice that the work will go forward by might and by power after all. To take Zechariah seriously is to make dependence on the Spirit the first thing rather than the last.

It also changes how we serve. When we know the outcome rests on the Spirit, we are freed from both anxiety and self-importance. We can labour hard without the crushing fear that everything depends on our performance, and we can rejoice in success without claiming the credit that belongs to God. The servant who has absorbed the truth of “not by might” works with a strange combination of diligence and rest, throwing himself into the task while leaning his whole weight on the One who actually accomplishes it.

And it reshapes how we judge fruitfulness. We are tempted to measure ministry by what can be counted, by crowds and budgets and buildings. The word “not by might” warns us that the things which impress people are not always the things that move God, and that He often does His deepest work through means the world would overlook. The day of small things is not a season to be endured until the real work begins; it is frequently the very arena in which the Spirit is most at work. To live by “not by might” is therefore to keep a humble account of our own resources and a high account of His. It teaches us to expect God to act where we are weakest, and to give Him the praise when He does, since the whole point of “not by might” is that the glory comes back to the Spirit who supplied the oil for the lamp. Once “not by might” has truly taken hold of us, we stop measuring ourselves against the strong and start leaning, gladly and wholly, on the Spirit of the Lord of hosts.

So, now what?

When you face a task that is plainly beyond you, the word “not by might” turns your eyes to the right source of strength. The question is not whether you have the resources, the numbers, or the talent, but whether you are depending on the Spirit of God. Begin there, in prayer and in conscious reliance on Him, and then take up the work in front of you trusting Him to supply what you lack.

This also guards us from two opposite errors. It keeps us from the pride that thinks the work of God depends on our brilliance, and it keeps us from the despair that thinks the work of God is finished because our resources are small. The oil for the lamp does not come from us, and it never runs out. To live in the good of this verse is to keep being filled with the Spirit, a daily reliance we describe in our article on being filled with the Spirit.

So do not despise your day of small things. The God who finished a temple through a discouraged remnant is well able to finish what He has begun in you, and He will do it by His Spirit, that the praise may be His.

“Then he said to me, “This is the word of the Lord to Zerubbabel: Not by might, nor by power, but by my Spirit, says the Lord of hosts.”” Zechariah 4:6