Matthew 7:6

"Give not that which is holy unto the dogs, neither cast ye your pearls before swine." "Yet surely further on," it will be said, "He commanded, 'What ye have heard in the ear, that preach ye upon the housetops.'" But this is in no wise contrary to the former. For neither in that place did He simply command to tell all men, but to whom it should be spoken, to them He bade speak with freedom. And by "dogs" here He figuratively described them that are living in incurable ungodliness, and affording no hope of change for the better; and by "swine," them that abide continually in an unchaste life, all of whom He hath pronounced unworthy of hearing such things. Paul also, it may be observed, declared this when He said, "But a natural man receiveth not the things of the Spirit, for they are foolishness unto him." And in many other places too He saith that corruption of life is the cause of men's not receiving the more perfect doctrines. Wherefore He commands not to open the doors to them; for indeed they become more insolent after learning. For as to the well-disposed and intelligent, things appear venerable when revealed, so to the insensible, when they are unknown rather. "Since then from their nature, they are not able to learn them, let the thing be hidden," saith He, "that at least for ignorance they may reverence them. For neither doth the swine know at all what a pearl is. Therefore since he knows not, neither let him see it, lest he trample under foot what he knows not." For nothing results, beyond greater mischief to them that are so disposed when they hear; for both the holy things are profaned by them, not knowing what they are; and they are the more lifted up and armed against us. For this is meant by, "lest they trample them under their feet, and turn again and rend you." Nay, "surely," saith one, "they ought to be so strong as to remain equally impregnable after men's learning them, and not to yield to other people occasions against us." But it is not the things that yield it, but that these men are swine; even as when the pearl is trampled under foot, it is not so trampled, because it is really contemptible, but because it fell among swine. And full well did He say, "turn again and rend you:" for they feign gentleness, so as to be taught: then after they have learnt, quite changing from one sort to another, they jeer, mock and deride us, as deceived persons. Therefore Paul also said to Timothy, "Of whom be thou ware also; for he hath greatly withstood our words;" and again in another place, "From such turn away," and, "A man that is an heretic, after the first and second admonition, reject." It is not, you see, that those truths furnish them with armor, but they become fools in this way of their own accord, being filled with more willfulness. On this account it is no small gain for them to abide in ignorance, for so they are not such entire scorners. But if they learn, the mischief is twofold. For neither will they themselves be at all profited thereby, but rather the more damaged, and to thee they will cause endless difficulties. Let them hearken, who shamelessly associate with all, and make the awful things contemptible. For the mysteries we too therefore celebrate with closed doors, and keep out the uninitiated, not for any weakness of which we have convicted our rites, but because the many are as yet imperfectly prepared for them. For this very reason He Himself also discoursed much unto the Jews in parables, "because they seeing saw not." For this, Paul likewise commanded "to know how we ought to answer every man."

(ubi sup.) For having removed from our own eye the beam of envy, of malice, or hypocrisy, we shall see clearly to cast the beam out of our brother's eye. (ubi sup.) Because the simplicity to which He had been directing in the foregoing precepts might lead some wrongly to conclude that it was equally wrong to hide the truth as to utter what was false, He well adds, Give not that which is holy to the dogs, and cast not your pearls before swine. (Serm. in Mont. ii. 20.) Let us see now what is the holy thing, what are the dogs, what the pearls, what the swine? The holy thing is all that it were impiety to corrupt; a sin which may be committed by the will, though the thing itself be undone. The pearls are all spiritual things that are to be highly esteemed. Thus though one and the same thing may be called both the holy thing and a pearl, yet it is called holy because it is not to be corrupted; and called a pearl because it is not to be contemned. (ubi sup.) The dogs are those that assault the truth; the swine we may not unsuitably take for those that despise the truth. Therefore because dogs leap forth to rend in pieces, and what they rend, suffer not to continue whole, He said, Give not that which is holy to the dogs; because they strive to the utmost of their power to destroy the truth. The swine though they do not assault by biting as dogs, yet do they defile by trampling upon, and therefore He said, Cast not your pearls before swine. (ubi sup.) That which is despised is said to be trodden under foot: hence it is said, Lest perchance they tread them under foot. (ubi sup.) That which follows, Turn again and rend you, He means not the pearls themselves, for these they tread under foot, and when they turn again that they may hear something further, then they rend him by whom the pearls on which they had trode had been cast. For you will not easily find what will please him who has despised things got by great toil. Whoever then undertake to teach such, I see not how they shall not be trode upon and rent by those they teach. (ubi sup.) We must be careful therefore not to explain ought to him who does not receive it; for men the rather seek that which is hidden than that which is opened. He either attacks from ferocity as a dog, or overlooks from stupidity as swine. But it does not follow that if the truth be kept hid, falsehood is uttered. The Lord Himself who never spoke falsely, yet sometimes concealed the truth, as in that, I have yet many things to say unto you, the which ye are not now able to bear. (John 16:12.) But if any is unable to receive these things because of his filthiness, we must first cleanse him as far as lays in our power either by word or deed. But in that the Lord is found to have said some things which many who heard Him did not receive, but either rejected or contemned them, we are not to think that therein He gave the holy thing to the dogs, or cast His pearls before swine. He gave to those who were able to receive, and who were in the company, whom it was not fit should be neglected for the uncleanness of the rest. And though those who tempted Him might perish in those answers which He gave to them, yet those who could receive them by occasion of these inquiries heard many useful things. He therefore who knows what should be answered ought to make answer, for their sakes at least who might fall into despair should they think that the question proposed is one that cannot be answered. But this only in the case of such matters as pertain to instruction of salvation; of things superfluous or harmful nothing should be said; but it should then be explained for what reason we ought not to make answer in such points to the enquirer.

Otherwise; The Lord had commanded us to love our enemies, and to do good to those that sin against us. That from this Priests might not think themselves obliged to communicate also the things of God to such, He checked any such thought saying, Give not that which is holy to the dogs; as much as to say, I have bid you love your enemies, and do them good out of your temporal goods, but not out of My spiritual goods, without distinction. For they are your brethren by nature but not by faith, and God gives the good things of this life equally to the worthy and the unworthy, but not so spiritual graces. Otherwise; That which is holy denotes baptism, the grace of Christ's body, and the like; but the mysteries of the truth are intended by the pearls. For as pearls are inclosed in shells, and such in the deeps of the sea, so the divine mysteries inclosed in words are lodged in the deep meaning of Holy Scripture. Otherwise; The dog and the swine are unclean animals; the dog indeed in every respect, as he neither chews the cud, nor divides the hoof; but swine in one respect only, seeing they divide the hoof, though they do not chew the cud. Hence I think that we are to understand by the dog, the Gentiles who are altogether unclean, both in their life, and in their faith; but by the swine are to be understood heretics, because they seem to call upon the name of the Lord. Give not therefore that which is holy to the dogs, for that baptism and the other sacraments are not to be given but to them that have the faith. In like manner the mysteries of the truth, that is, the pearls, are not to be given but to such as desire the truth and live with human reason. If then you cast them to the swine, that is, to such as are grovelling in impurity of life, they do not understand their preciousness, but value them like to other worldly fables, and tread them under foot with their carnal life. Or; The swine not only trample upon the pearls by their carnal life, but after a little they turn, and by disobedience rend those who offend them. Yea often when offended they bring false accusation against them as sowers of new dogmas. The dogs also having trode upon holy things by their impure actions, by their disputings rend the preacher of truth. With good reason He forbade pearls to be given to swine. For if they are not to be set before swine that are the less unclean, how much more are they to be withheld from dogs that are so much more unclean. But respecting the giving that which is holy, we cannot hold the same opinion; seeing we often give the benediction to Christians who live as the brutes; and that not because they deserve to receive it, but lest perchance being more grievously offended they should perish utterly.

Or; The dogs are returned to their vomit; the swine not yet returned, but wallowing in the mire of vices.

(interlin.) He says, Lest perchance, because it may be that they will wisely turn from their uncleannessa.