To continue with our subject,^[1] let us take in our hands and examine this psalm, which the pure and stainless souls sing to God, saying, By the rivers of Babylon, there we sat down; we wept, when we remembered Zion. We hanged our harps on the willows in the midst thereof, clearly giving the name of harps to their bodies, which they hung on the branches of chastity, fastening them to the wood that they might not be snatched away and dragged along again by the stream of incontinence. For Babylon, which is interpreted disturbance or confusion, signifies this life around which the water flows, while we sit in the midst of the water that flows round us, as long as we are in the world, the rivers of evil always beating on us. Wherefore, also, we are always fearful, and we groan and cry with weeping to God, that our harps may not be snatched off by the waves of pleasure and slip down from the tree of chastity.

Certainly not, friends and brethren—I still call you brethren, though your attitude is not brotherly—do not let us accept such a view. We must not be like fiery, unruly horses, throwing reason our rider and spitting out the bit of discretion that so usefully restrains us, and running wide of the turning post. Let us conduct our debates within our frontiers and not be carried away to Egypt or dragged off to Assyria. Let us not sing the song of the Lord in a foreign land, by which I mean before any and every audience, heathen or Christian, friend or foe, sympathetic or hostile: these keep all too close a watch on us, and they would wish that the spark of our dissensions might become a conflagration; they kindle it, they fan it, by means of its own draught they raise it to the skies, and without our knowing what they are up to, they make it higher than the flames of Babylon that blazed all around. Having no strength in their own teaching, they hunt for it in our weakness, and for this reason like flies settling on wounds, they settle on our misfortune—or should I say our mistakes? Let us be blind to our doings no longer, and let us not neglect the proprieties in these matters. If we cannot resolve our disputes outright, let us at least make this mutual concession, to utter spiritual truths with the restraint due to them, to discuss holy things in a holy manner and not be broadcast to profane hearing what is not to be divulged.

And in this way also the just give up to destruction all their enemies, which are their vices, so that they do not spare even the children, that is, the early beginnings and promptings of evil. In this sense also we understand the language of Psalm 137: O daughter of Babylon, who is to be destroyed; happy shall he be that rewards you as you have served us; happy shall he be that takes and dashes your little ones against the stones. For the little ones of Babylon (which signifies confusion) are those troublesome sinful thoughts that arise in the soul, and one who subdues them by striking, as it were, their heads against the firm and solid strength of reason and truth, is the person who dashes the little ones against the stones; and he is therefore truly blessed. God may therefore have commanded people to destroy all their vices utterly, even at their birth, without having enjoined anything contrary to the teaching of Christ. And he may himself have destroyed before the eyes of those who were Jews inwardly all the offspring of evil as his enemies. And, in like manner, those who disobey the law and word of God may well be compared with his enemies led astray by sin; and they may well be said to suffer the same fate as they deserve who have proved traitors to the truth of God.

And David, pitying her, says, O wretched daughter of Babylon. Wretched indeed, as being the daughter of Babylon, when she ceased to be the daughter of Jerusalem. And yet he calls for a healer for her and says, Blessed is he who shall take your little ones and dash them against the rock. That is to say, shall dash all corrupt and filthy thoughts against Christ, who by his fear and his rebuke will break down all actions against reason, so as, if any one is seized by an adulterous love, to extinguish the fire, that he may by his zeal put away the love of a harlot and deny himself that he may gain Christ.