And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
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Gaius Marius Victorinus
It is Christ indeed who is the author of salvation. He is our head. He descended to us and redeemed us by his own mystery. It is he indeed who guards the heads of the faithful. Therefore he is the “helmet of salvation.” He is the Word by which the adverse powers are overcome and taken captive…. Christ, who is the Word of God, was sent to overcome all corruption and wickedness and even death itself. It is in this sense that Paul refers to “the sword of the Spirit, the Word of God.” . ...
Because of this helmet of salvation all the senses in our head remain intact. It especially protects the eyes. Solomon in Ecclesiastes notes that “the eyes of the wise are in the head.” Paul understood the importance of headship. He knew why the eyes are located in the head. If Christ is the head of a person of faith and “the eyes of the wise are in the head,” it follows that all our senses, mind, thought, speech and counsel (if, that is, we are wise) are in Christ. . ...
This is the sword that for our health spills the noxious blood that animates the matter of our sins, cutting out and excising whatever it finds in our soul that is carnal or earthly and, once it has made us dead to vices, causing us to live to God and flourish in spiritual virtues. .
And take the helmet, he continues, of salvation, that is, of your salvation. For he is casing them in armor.
And the sword of the Spirit, which is the word of God. He either means the Spirit, or else, the spiritual sword: for by this all things are severed, by this all things are cleft asunder, by this we cut off even the serpent's head. ...
Who will ply the sword without practising the contraries to lenity and justice; that is, guile, and asperity, and injustice, proper (of course) to the business of battles? See we, then, whether that which has another action be not another sword,-that is, the Divine word of God, doubly sharpened