But why am I speaking of this kind of oaths, while I pass over those in the market-place? For as regards these last, you can urge none of these pleas. For ten farthings you there have swearing and forswearing. In fact, because the thunderbolt does not actually fall from heaven, because all things are not overthrown, you stand holding God in your bonds: to get a few vegetables, a pair of shoes, for a little matter of money, calling Him to witness. What is the meaning of this? Do not let us imagine, that because we are not punished, therefore we do not sin; this comes of God's mercy; not of our merit.
Let your oath be an imprecation upon your own child, upon your own self: say, “Else let the hangman lash my ribs.” But you dare not. Is God less valuable than your ribs? Is He less precious than your pate? Say “Else let me be struck blind.” But no. Christ so spares us, that He will not let us swear even by our own head; and yet we so little spare the honor of God, that on all occasions we must drag Him in! You know not what God is, and with what sort of lips he behooves to be invoked.
Why, when we speak of any man of eminent worth, we say, “First wash your mouth, and then make mention of him:” and yet, that precious Name which is above every name, the Name which is marvellous in all the earth, the Name which devils hear and tremble, we haul about as we list! Oh! The force of habit! Thereby has that Name become cheap. No doubt, if you impose on any one the necessity of coming into the sacred edifice to take his oath there, you feel that you have made the oath an awful one.
And yet how is it that it seems awful in this way, but because we have been in the habit of using that at random, but not this? For ought not a shudder of awe to be felt when God is but named? But now, whereas among the Jews His Name was held to be so reverend, that it was written upon plates, and none was allowed to wear the characters except the high-priest alone: we bandy about His Name like any ordinary word. If simply to name God was not allowed to all; to call Him to witness, what audacity is it! nay, what madness!
For if need were (rather than this) to fling away all that you have, ought you not readily to part with all? Behold, I solemnly declare and testify; reform these oaths of the forum, these superfluous oaths, and bring to me all those who wish to take them. Behold, in the presence of this assembly, I charge those who are set apart for the tending of the Houses of Prayer, I exhort and issue this order to them, that no person be allowed to take such oaths at his own discretion: or rather, that none be allowed to swear in any other way, but that the person be brought to me, whosoever he be, since even for these matters less will not serve but they must needs come before us, just as if one had to do with little children.
May there be no occasion! It is a shame in some things still to need to be taught. Do you dare to touch the Holy Table, being a person unbaptized? No, but what is still worse, you the baptized dare to lay your hand upon the Holy Table, which not even all ordained persons are allowed to touch, and so to take your oath. Now you would not go and lay your hand upon the head of your child, and yet do you touch the Table, and not shudder, not feel afraid? Bring these men to me; I will judge, and send them away rejoicing, both the one and the other. Do what you choose; I lay it down as a law that there be no swearing at all.
What hope of salvation, while we thus make all to have been done in vain? Is this the end of your bills, and your bonds, that you should sacrifice your own soul? What gain do you get so great as the loss? Has he forsworn himself? You have undone both him and yourself. But has he not? Even so still you have undone (both), by forcing him to transgress the commandment. Let us cast out this disease from the soul: at any rate let us drive it out of the forum, out of our shops, out of our other work-places; our profits will but be the greater.
Do not imagine that the success of your worldly plans is to be ensured by transgressions of the Divine laws. “But he refuses to trust me,” say you; and in fact I have sometimes heard this said by some: “Unless I swear oaths without number, the man will not trust me.” Yes, and for this you may thank yourself, because you are so off-hand with your oaths. For were it not so, but on the contrary were it clear to all men that you do not swear, take my word for it, you would be more readily believed upon your mere nod, than those are who swallow oaths by thousands.
For look now: which do you more readily believe? Me who do not swear, or those that do swear? “Yes,” say you, “but then you are ruler and bishop.” Then suppose I prove to you that it is not only for that reason? Answer me with truth, I beseech you; were I in the habit of perpetually swearing, would my office stand me in that stead? Not a whit. Do you see that it is not for this reason? And what do you gain at all? Answer me that. Paul endured hunger; do you then also choose to hunger rather than to transgress one of the commandments of God.
Why are you so unbelieving? Here are you, ready to do and suffer all things for the sake of not swearing: and shall not He reward you? Shall He, Who sustains day by day both takers and breakers of oaths, give you over to hunger, when you have obeyed Him? Let all men see, that of those who assemble in this Church not one is a swearer. By this also let us become manifest, and not by our creed alone; let us have this mark also to distinguish us both from the Gentiles and from all men.
Let us receive it as a seal from heaven, that we may everywhere be seen to be the King's own flock. By our mouth and tongue let us be known, in the first place, just as the barbarians are by theirs: even as those who speak Greek are distinguished from barbarians, so let us be known. Answer me: the birds which are said to be parrots, how are they known to be parrots? Is it not by speaking like men? Let us then be known by speaking like the Apostles; by speaking like the Angels.
If any one bid you swear tell him, “Christ has spoken, and I do not swear.” This is enough to make a way for all virtue to come in. It is a gate to religion, a high road leading to the philosophy of piety; a kind of training-school. These things let us observe, that we may obtain also the future blessings, through the grace and mercy of our Lord Jesus Christ, to Whom with the Father and the Holy Ghost together be glory, power and honor, now and ever, world without end. Amen.
Source: Homilies on Acts (New Advent)