A plumb line held against a wall

A prophet is shown a vision of God standing by a wall, holding a tool.

A plumb line is a weight on a string. Hold it against a wall and gravity does the rest — the string hangs true, and the wall either matches it or does not.

That is the whole technology, and it has not changed in four thousand years, because it cannot be improved. There is nothing to calibrate. The earth does the measuring.

And God says He is setting one among His people.

Two things about a plumb line are worth taking slowly.

First: it does not push the wall. It exposes it. A wall out of true is not made worse by the measurement; it is only revealed. And a wall can stand for years looking perfectly acceptable, because the eye adjusts and the whole street may lean the same way.

Second: the line has no opinion. It is not stricter on some walls than others, and it cannot be negotiated with. The standard comes from outside the building entirely.

A community can drift a long way while every member is checking himself against the others. Everyone in the room can be leaning, and nobody feels crooked, because crooked is measured against the wall next to you.

The plumb line is the alternative, and Amos says God supplies it.

The image appears twice more with the same force. God says of Jerusalem that He will stretch out over it the measuring line used against Samaria and the plumb line used against the house of Ahab — the tools of a demolition survey.

I will make justice the measuring line and righteousness the plumb line. Said to men who had made a covenant with death and taken refuge in lies.

And the honest consequence has to be said. What follows Amos’ vision is not a repair. God says He will spare them no longer, and the high places will be desolate. A plumb line is used before rebuilding and before demolition, and the wall does not choose which.

And there is a mercy in the tool that the judgment context can hide. A plumb line is how you build straight in the first place. It is not only a survey instrument for condemned buildings; it is what a mason keeps beside him all day, checking as he goes, so that the wall never gets far out of true before he catches it.

But note where the image finally lands. Zechariah 4 has a plumb line in the hand of Zerubbabel, and the people who despised the day of small things rejoice to see it — because that time the wall was going up.

The Hebrew word in Amos 7:7–8, anak, occurs only in this passage and its meaning has been debated. The traditional rendering is plumb line or lead; some scholars argue for tin, and read the vision as God standing by a wall with a tin weapon in His hand. Translations divide, and the plumb line reading remains the majority.

2 Kings 21:13 uses different vocabulary — the measuring line of Samaria and the plumb line of the house of Ahab — and applies it to Jerusalem. The measuring imagery there is explicitly about judgment: I will wipe Jerusalem as one wipes a dish, wiping it and turning it upside down.

Zechariah 4:10 has the plumb line, or the chosen stone, in Zerubbabel’s hand at the rebuilding of the temple, in the passage that asks who despises the day of small things. The same tool that condemned the old wall measures the new one.

Amos’ vision cycle runs through locusts, fire, the plumb line, a basket of summer fruit and the Lord standing by the altar. In the first two visions Amos intercedes and God relents; at the plumb line he does not intercede, and God does not relent. The silence in verse 8 is part of the account.

Amos is described in the next paragraph as neither a prophet nor a prophet’s son but a herdsman and a tender of sycamore figs, taken by the LORD from following the flock. The man shown the plumb line was a working man who knew what one was for.

Look it upH594 אֲנָך anak, plumb line, lead · H6957 קַו qav, measuring line · H4949 מִשׁקֹלֶת mishqoleth, level, plummet · H2436 חוֹמָה chomah, wall

Then read 2 Corinthians 10:12, where Paul says that those who measure themselves by themselves and compare themselves with themselves are not wise. It is the plumb-line problem stated in the language of a first-century argument.

Where this touchesAmos 7:1–9 · 2 Kings 21:13 · Isaiah 28:14–17 · Zechariah 4:8–10 · 2 Corinthians 10:12–18. Fire and hammer, honey, lamp, sword, seed, milk, mirror, goads and nails, gold, washing, the fire in the bones, dew and the stumbling stone were the earlier self-portraits.