9 Let us take these arms, let us fortify ourselves with these spiritual and heavenly safeguards, that in the most evil day we may be able to withstand, and to resist the threats of the devil: let us put on the breastplate of righteousness, that our breast may be fortified and safe against the darts of the enemy: let our feet be shod with evangelical teaching, and armed, so that when the serpent shall begin to be trodden and crushed by us, he may not be able to bite and trip us up: let us bravely bear the shield of faith, by the protection of which, whatever the enemy darts at us may be extinguished: let us take also for protection of our head the helmet of salvation, that our ears may be guarded from hearing the deadly edicts; that our eyes may be fortified, that they may not see the odious images; that our brow may be fortified, so as to keep safe the sign of God;2 that our mouth may be fortified, that the conquering tongue may confess Christ its Lord: let us also arm the right hand with the sword of the Spirit, that it may bravely reject the deadly sacrifices; that, mindful of the Eucharist, the hand which has received the Lord's body2 may embrace the Lord Himself, hereafter to receive from the Lord the reward of heavenly crowns.
Source: The Epistles of Cyprian (New Advent)