Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness arrayed, and with your feet fitted with the readiness of the gospel of peace. In addition to all this, take up the shield of faith, with which you can extinguish all the flaming arrows of the evil one. And take the helmet of salvation and the sword of the Spirit, which is the word of God.
but with righteousness He will judge the poor, and with equity He will decide for the lowly of the earth. He will strike the earth with the rod of His mouth and slay the wicked with the breath of His lips. Righteousness will be the belt around His hips, and faithfulness the sash around His waist.
Significance
Paul's description of the believer's armor draws not only from Isaiah 59:17 (Yahweh as warrior) but also from Isaiah 11:4-5, where the messianic Branch is girded with "righteousness" (tsedaqah) as his belt and "faithfulness" (emunah) as the sash around his waist, and strikes the earth "with the rod of his mouth" and slays the wicked "with the breath of his lips." Paul's "belt of truth" and "breastplate of righteousness" (Eph 6:14) correspond to the Messiah's righteousness and faithfulness in Isaiah 11:5, while the "sword of the Spirit, which is the word of God" (Eph 6:17) parallels the rod of the Messiah's mouth. The theological implication is profound: believers wage spiritual warfare not with their own resources but by being clothed in the Messiah's own attributes. What Isaiah prophesied as the Messiah's personal equipment, Paul applies to the church corporately, suggesting that union with Christ means sharing in his victory. The Spirit-empowered word of God as the offensive weapon directly echoes the messianic figure's oral authority over evil.