1 I have received by Cyprian, deacon, three letters, or rather three little books, at the same time, from your Excellency, containing what you call sundry questions, but what I feel to be animadversions on opinions which I have published, to answer which, if I were disposed to do it, would require a pretty large volume. Nevertheless I shall attempt to reply without exceeding the limits of a moderately long letter, and without causing delay to our brother, now in haste to depart, who only three days before the time fixed for his journey asked earnestly for a letter to take with him, in consequence of which I am compelled to pour out these sentences, such as they are, almost without premeditation, answering you in a rambling effusion, prepared not in the leisure of deliberate composition, but in the hurry of extemporaneous dictation, which usually produces a discourse that is more the offspring of chance than the parent of instruction; just as unexpected attacks throw into confusion even the bravest soldiers, and they are compelled to take to flight before they can gird on their armour.
2. But our armour is Christ; it is that which the Apostle Paul prescribes when, writing to the Ephesians, he says, “Take unto you the whole armour of God, that you may be able to withstand in the evil day;” and again, “Stand, therefore, having your loins girt about with truth, and having on the breastplate of righteousness; and your feet shod with the preparation of the gospel of peace; above all, taking the shield of faith, wherewith you shall be able to quench all the fiery darts of the wicked: and take the helmet of salvation, and the sword of the Spirit, which is the word of God.” Armed with these weapons, King David went forth in his day to battle; and taking from the torrent's bed five smooth rounded stones, he proved that, even amidst all the eddying currents of the world, his feelings were free both from roughness and from defilement; drinking of the brook by the way, and therefore lifted up in spirit, he cut off the head of Goliath, using the proud enemy's own sword as the fittest instrument of death, smiting the profane boaster on the forehead and wounding him in the same place in which Uzziah was smitten with leprosy when he presumed to usurp the priestly office; the same also in which shines the glory that makes the saints rejoice in the Lord, saying, “The light of Your countenance is sealed upon us, O Lord.” Let us therefore also say, “My heart is fixed, O God, my heart is fixed: I will sing and give praise: awake up, my glory; awake, psaltery and harp; I myself will awake early;” that in us may be fulfilled that word, “Open your mouth wide, and I will fill it;” and, “The Lord shall give the word with great power to them that publish it.” I am well assured that your prayer as well as mine is, that in our contendings the victory may remain with the truth. For you seek Christ's glory, not your own: if you are victorious, I also gain a victory if I discover my error. On the other hand, if I win the day, the gain is yours; for “the children ought not to lay up for the parents, but the parents for the children.” We read, moreover, in Chronicles, that the children of Israel went to battle with their minds set upon peace, seeking even amid swords and bloodshed and the prostrate slain a victory not for themselves, but for peace. Let me therefore, if it be the will of Christ, give an answer to all that you have written, and attempt in a short dissertation to solve your numerous questions. I pass by the conciliatory phrases in your courteous salutation: I say nothing of the compliments by which you attempt to take the edge off your censure: let me come at once to the matters in debate.
Source: Letters (New Advent)