“And take the helmet of salvation, and the sword of the Spirit, which is the word of God:”
King James Version (KJV)
6:17 And take for an helmet the hope of salvation - #1Thes 5:8|. The head is that part which is most carefully to be defended. One stroke here may prove fatal. The armour for this is the hope of salvation. The lowest degree of this hope is a confidence that God will work the whole work of faith in us; the highest is a full assurance of future glory, added to the experimental knowledge of pardoning love. Armed with this helmet, the hope of the joy set before him, Christ endured the cross, and despised the shame, #Heb 12:2|. And the sword of the Spirit, the word of God - This Satan cannot withstand, when it is edged and wielded by faith. Till now our armour has been only defensive. But we are to attack Satan, as well as secure ourselves; the shield in one hand, and the sword in the other. Whoever fights with the powers of hell will need both. He that is covered with armour from head to foot, and neglects this, will be foiled after all. This whole description shows us how great a thing it is to be a Christian. The want of any one thing makes him incomplete. Though he has his loins girt with truth, righteousness for a breastplate, his feet shod with the preparation of the gospel, the shield of faith, the helmet of salvation, and the sword of the Spirit; yet one thing he wants after all. What is that? It follows,
Eph 6:17 Take the helmet of salvation. The Roman soldier wore on his head a metallic cap to protect it from blows, called a helmet. Isa 59:17 says: "He put a helmet of salvation on his head". See also 1Th 5:8. Salvation, the consciousness that we have a Savior "able to save unto the uttermost" (Heb 7:25). And the sword of the Spirit. The armor before described is to protect; the sword to assail. It is the Christian soldier who is to wield the sword of the Spirit. That is, the Spirit conquers through him. The word is the word of God. Thus Peter conquered on Pentecost, and Paul in his labors. Thus always and everywhere. The Christian soldier filled with the Spirit must "preach the word". See Heb 4:12.