Breastplate

A breastplate is a covering for the chest: in Scripture the word refers either to the square, gem-studded pouch worn by Israel’s high priest over his heart when he entered the sanctuary, or to the piece of armor that protects a warrior’s torso.

The text describes the priestly breastplate as a folded, span-square pouch of gold, blue, purple, and scarlet yarn and fine twisted linen, set with twelve stones in four rows of three (Exodus 28:17, Exodus 28:20), each stone engraved like a signet with the name of one of the tribes, “according to the names of the children of Israel, twelve” (Exodus 28:21). It was attached to the ephod and worn “on his heart… for a memorial before Yahweh continually” (Exodus 28:29), and it is called the “breastplate of judgment” because the Urim and Thummim were placed inside it (Exodus 28:30), a detail Leviticus 8:8 records at Aaron’s investiture. Linguistically, the underlying Hebrew noun is rare and its exact sense—pouch, ornament, or both—is debated, and several of the twelve stones cannot be identified with certainty.

Elsewhere the breastplate is ordinary defensive armor. Isaiah 59:17 pictures Yahweh clothing himself with righteousness as a breastplate and salvation as a helmet, an image taken up in Ephesians 6:14 (“the breastplate of righteousness”) and, with faith and love instead of righteousness, in 1 Thessalonians 5:8. Revelation 9:9 and Revelation 9:17 use breastplates only descriptively, of the iron and brightly colored cuirasses of the visionary cavalry. As a matter of historical usage, the Greek word behind the New Testament term normally denoted a cuirass covering chest and back, made of leather, linen, bronze, or scale.

One way to read the armor passages is as a call to a character formed by the gospel rather than to literal equipment; the priestly breastplate has likewise been read as a picture of representative intercession, with the tribes’ names carried continually before God. Traditions differ at several points. Many Lutheran and Reformed readers take “the breastplate of righteousness” to mean the righteousness of Christ credited to the believer, so that the armor is a gift received; Catholic, Orthodox, and Wesleyan-Holiness teaching commonly stresses righteousness formed in the believer through grace and sanctification, so that the breastplate is also a life of practiced virtue, though most traditions hold the two together. Readers also differ over whether the Urim and Thummim were sacred lots, a luminous object, or emblems of office, and over whether such direct inquiry belongs only to the old covenant sanctuary.

AI-generated reference entry, grounded in the passages where this term appears — history and Scripture stated as such, interpretation labeled as interpretation. Not a substitute for the text itself.