Plumb Line

Biblical Text

The plumb line appears in Amos 7:7–9. The prophet Amos saw a vision of the Lord standing beside a wall with a plumb line in His hand. The wall had originally been built true to the plumb line. God declares, "Behold, I will set a plumbline in the midst of my people Israel: I will not again pass by them any more" (Amos 7:8), and announces that the high places and sanctuaries of Israel will be laid waste and that the house of Jeroboam will fall by the sword.

This scene is the third of Amos's five visions: the locusts (7:1–3), the fire (7:4–6), the plumb line (7:7–9), the basket of summer fruit (8:1–3), and the Lord standing beside the altar (9:1–4). In the first two visions, God relents when Amos intercedes. From the plumb line vision onward, no intercession is recorded, and judgment is settled. Immediately afterward comes the account of Amaziah, the priest of Bethel, attempting to drive Amos away (7:10–17).

The same image appears in other passages. In 2 Kings 21:13, because of the sins of Manasseh, God says He will stretch over Jerusalem "the line of Samaria, and the plummet of the house of Ahab." This means that Judah, like the northern kingdom of Israel, will be judged. By contrast, Zechariah 4:10 says that they "shall rejoice, and shall see the plummet in the hand of Zerubbabel"; here the plumb line serves as a sign of hope that the rebuilding of the temple is actually under way.

Background

A plumb line is a cord with a heavy weight hung from its end. Builders in the ancient Near East used it to confirm that a wall stood vertical. The Korean term for the plumb line derives from darim, a word referring to gauging whether something is level or vertical.

The Hebrew word 'anak, translated "plumb line" in Amos 7, occurs in the Old Testament only in this passage, and its meaning is therefore debated. Traditionally it has been understood as lead or a lead weight and rendered "plumb line." Some scholars connect the word with the Akkadian annaku and read it as "tin," interpreting the passage differently.

Broader Biblical Significance

The plumb line represents the standard by which God measures His people. Just as a crooked wall is torn down, a community that does not conform to that standard will collapse. Isaiah 28:17, "Judgment also will I lay to the line, and righteousness to the plummet," is read as a metaphor of the same kind.

The term "plumb line" does not appear in the New Testament. Some interpreters, however, see the idea of God measuring and judging carried forward in passages such as the reed used to measure the temple in Revelation 11:1.

Interpretations and Issues

• As an instrument of testing: This view reads the vision as God examining Israel by His standard. It is the most widely held understanding.
• As a symbol of destruction: Scholars who follow the "tin" interpretation propose other meanings, such as associating the word with weapons or instruments of judgment.

In preaching, the image is often applied in statements such as "Christ is our plumb line" or "the Word is the plumb line." These are theological applications made by preachers rather than what the text directly states.

In the Korean Church

In Korean church preaching, the plumb line is frequently used as a metaphor for the standard of God's Word by which faith and life are set right. It appears especially often in calls for personal repentance or church reform.