Matthew 15:17

How is it possible to say that the serpent, created by God dumb and irrational, was endowed with reason and speech? For if it had the power of itself to speak, to discern, to understand, and to reply to what was spoken by the woman, there would have been nothing to prevent every serpent from doing this also. If, however, they say again that it was according to the divine will and dispensation that this [serpent] spake with a human voice to Eve, they render God the author of sin. Neither was it possible for the evil demon to impart speech to a speechless nature, and thus from that which is not to produce that which is; for if that were the case, he never would have ceased (with the view of leading men astray) from conferring with and deceiving them by means of serpents, and beasts, and birds. …

But what reason is there in going to prayer with hands indeed washed, but the spirit foul? inasmuch as to our hands themselves spiritual purities are necessary, that they may be “lifted up pure” from falsehood, from murder, from cruelty, from poisonings, from idolatry, and all the other blemishes which, conceived by the spirit, are effected by the operation of the hands. These are the true purities; not those which most are superstitiously careful about, taking water at every prayer, even when they are coming from a bath of the whole body. When I was scrupulously making a thorough investigation of this practice, and searching into the reason of it, I ascertained it to be a commemorative act, bearing on the surrender of our Lord. …

But it is to be observed that the Jews, who claim for themselves a correct understanding of the law of Moses, carefully restrict their food to such things as are accounted clean, and abstain from those that are unclean. They also do not use in their food the blood of an animal nor the flesh of an animal torn by wild beasts, and some other things which it would take too long for us at present to detail. But Jesus, wishing to lead all men by His teaching to the pure worship and service of God, and anxious not to throw any hindrance in the way of many who might be benefited by Christianity, through the imposition of a burdensome code of rules in regard to food, has laid it down, that “not that which goeth into the mouth defileth a man, but that which cometh out of the mouth; for whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught. …

After this, it is worth while to look at the phrase which has been assailed in a sophistical way by those who say that the God of the law and the God of the Gospel of Jesus Christ is not the same; for they say that the heavenly Father of Jesus Christ is not the husbandman of those who think that they worship God according to the law of Moses. Jesus Himself said that the Pharisees, who were worshipping the God who created the world and the law, were not a plant which His heavenly Father had planted, and that for this reason it was being rooted up. …

18. Some thoughts, then, are speeches of the heart, wherein the Lord also shows that there is a mouth, when He says, “Not that which entereth into the mouth defileth a man; but that which proceedeth out of the mouth, that defileth a man.” In one sentence He has comprised two diverse mouths of the man, one of the body, one of the heart. For assuredly, that from which they thought the man to be defiled, enters into the mouth of the body; but that from which the Lord said the man was defiled, proceedeth out of the mouth of the heart. So certainly He Himself explained what He had said. For a little after, He says also to His disciples concerning the same thing: “Are ye also yet without understanding? Do ye not understand, that whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught?” Here He most certainly pointed to the mouth of the body. …

4. For which cause our Lord Himself also with His own mouth saith, “Cleanse what are within, and what are without will be clean.” And, also, in another place, when He was refuting the foolish speeches of the Jews, in that they spake evil against His disciples, eating with unwashen hands; “Not what entereth into the mouth,” said He, “defileth the man: but what cometh forth out of the mouth, that defileth the man.” Which sentence, if the whole of it be taken of the mouth of the body, is absurd. For neither doth vomit defile him, whom food defileth not. Forsooth food entereth into the mouth, vomit proceedeth forth out of the mouth. …

32. Manifestly also in the Gospel we find the mouth of the heart: so that in one place the Lord is found to have mentioned the mouth both of the body and of the heart, where he saith, “Are ye also yet without understanding? Do ye not yet understand, that whatsoever entereth in at the mouth, goeth into the belly, and is cast out into the draught? but those things which proceed out of the mouth come forth from the heart, and they defile the man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies: these are the things which defile a man.” Here if thou understand but one mouth, that of the body, how wilt thou understand, “Those things which proceed out of the mouth, come forth from the heart;” since spitting also and vomiting proceed out of the mouth? Unless peradventure a man is but then defiled when he eateth aught unclean, but …

31. You follow Adimantus in saying that Christ made no distinction in food, except in entirely prohibiting the use of animal food to His disciples, while He allowed the laity to eat anything that is eatable; and declared that they were not polluted by what enters into the mouth, but that the unseemly things which come out of the mouth are the things which defile a man. These words of yours are unseemly indeed, for they express notorious falsehood. If Christ taught that the evil things which come out of the mouth are the only things that defile a man, why should they not be the only things to defile His disciples, so as to make it unnecessary that any food should be forbidden or unclean? Is it only the laity that are not polluted by what goes into the mouth, but by what comes out of it? In that case, they are better protected from impurity than the saints, who are polluted both by what go …

16. Let us flee then, beloved, let us flee slander! knowing that it is the very gulph of Satan, and the place where he lurks with his snares. For in order that we may be careless of our own state, and may thus render our account heavier, the devil leads us into this custom. But more than this it is not only a very serious matter, that we shall hereafter have to give account of what we have spoken, but that we shall make our own offences the heavier by these means; depriving ourselves of all excuse. For he who scans with bitterness the conduct of others, can never obtain pardon for the sins committed by himself. For God will determine the sentence, not only from the nature of our transgressions, but from the judgment which thou hast passed upon others. …

But these things He said, and reproved them, in order to cast out their prejudice; He stopped not however at this, but adds other things also, saying, “That whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught; but those things which proceed out of the mouth come forth from the heart, and they defile the man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, blasphemies, false-witnessings: and these are the things that defile the man: but to eat with unwashen hands defileth not the man.”

15. Give us this day our substantial bread . This common bread is not substantial bread, but this Holy Bread is substantial, that is, appointed for the substance of the soul. For this Bread goeth not into the belly and is cast out into the draught , but is distributed into thy whole system for the benefit of body and soul. But by this day , he means, “each day,” as also Paul said, While it is called to-day .