Our Lord's Sermon on the Mount

⁶⁷ But inasmuch as the word “guileless” may mislead some who are desirous of obeying God's precepts, so that they may think it wrong, at times, to conceal the truth, just as it is wrong at times to speak a falsehood, and inasmuch as in this way—by disclosing things which the parties to whom they are disclosed are unable to bear—they may do more harm than if they were to conceal them altogether and always, He very rightly adds: “Give not that which is holy to the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.” For the Lord Himself, although He never told a lie, yet showed that He was concealing certain truths, when He said, “I have yet many things to say unto you, but you cannot bear them now.” And the Apostle Paul, too, says: “And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ. I have fed you with milk, and not with meat: for hitherto you were not able to bear it, neither yet now are you able. For you are yet carnal.”

68. Now, in this precept by which we are forbidden to give what is holy to the dogs, and to cast our pearls before swine, we must carefully require what is meant by holy, what by pearls, what by dogs, what by swine. A holy thing is something which it is impious to violate and to corrupt; and the very attempt and wish to commit that crime is held to be criminal, although that holy thing should remain in its nature inviolable and incorruptible. By pearls, again, are meant whatever spiritual things we ought to set a high value upon, both because they lie hidden in a secret place, are as it were brought up out of the deep, and are found in wrappings of allegory, as it were in shells that have been opened. We may therefore legitimately understand that one and the same thing may be called both holy and a pearl: but it gets the name of holy for this reason, that it ought not to be corrupted; of a pearl for this reason, that it ought not to be despised. Every one, however, endeavours to corrupt what he does not wish to remain uninjured: but he despises what he thinks worthless, and reckons to be as it were beneath himself; and therefore whatever is despised is said to be trampled on. And hence, inasmuch as dogs spring at a thing in order to tear it in pieces, and do not allow what they are tearing in pieces to remain in its original condition, “Give not,” says He, “that which is holy unto the dogs:” for although it cannot be torn in pieces and corrupted, and remains unharmed and inviolable, yet we must think of what is the wish of those parties who bitterly and in a most unfriendly spirit resist, and, as far as in them lies, endeavour, if it were possible, to destroy the truth. But swine, although they do not, like dogs, fall upon an object with their teeth, yet by recklessly trampling on it defile it: “Do not therefore cast your pearls before swine, lest they trample them under their feet, and turn again and rend you.” We may therefore not unsuitably understand dogs as used to designate the assailants of the truth, swine the despisers of it.

69. But when He says, “they turn again and rend you,” He does not say, they rend the pearls themselves. For by trampling on them, just when they turn in order that they may hear something more, they yet rend him by whom the pearls have just been cast before them which they have trampled on. For you would not easily find out what pleasure the man could have who has trampled pearls under foot, i.e. has despised divine things whose discovery is the result of great labour. But in regard to him who teaches such parties, I do not see how he would escape being rent in pieces through their anger and wrathfulness. Moreover, both animals are unclean, the dog as well as the swine. We must therefore be on our guard, lest anything should be opened up to him who does not receive it: for it is better that he should seek for what is hidden, than that he should either attack or slight at what is open. Neither, in fact, is any other cause found why they do not receive those things which are manifest and of importance, except hatred and contempt, the one of which gets them the name of dogs, the other that of swine. And all this impurity is generated by the love of temporal things, i.e. by the love of this world, which we are commanded to renounce, in order that we may be able to be pure. The man, therefore, who desires to have a pure and single heart, ought not to appear to himself blameworthy, if he conceals anything from him who is unable to receive it. Nor is it to be supposed from this that it is allowable to lie: for it does not follow that when truth is concealed, falsehood is uttered. Hence, steps are to be taken first, that the hindrances which prevent his receiving it may be removed; for certainly if pollution is the reason he does not receive it, he is to be cleansed either by word or by deed, as far as we can possibly do it.