Matthew 15:9

But in vain they do worship me, teaching for doctrines the commandments of men.
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George Leo Haydock

AD 1849
In vain they worship, or think they worship God, who neglect the divine commandments to observe the commands of men. We must not here suppose that Christ censures the commands of the Church, or the tradition of the apostles, because these are in nowise contrary to the divine law, but rather serve to enforce it, and reduce it to practice; nor are they so much the commands of men, as of God, delivered to us by his ambassadors. Christ censures such as are merely human, such as those mentioned here, which are vain and futile, as the superstitious washing of hands; or erroneous, as that the soul is defiled by meat; or openly contrary to natural and divine law, as the defrauding parents of their just support. (Tirinus) It is evidently erroneous to argue from this text against apostolic traditions. St. Paul tells the Thessalonians, to stand fast, and hold the traditions which they had been taught, whether by word of mouth or by epistles. (2 Thessalonians ii. 14.) Commandments of men. The do...

John Chrysostom

AD 407
Did you notice that prophecy agrees exactly with what was said here and that it long ago predicted their evil? For this very thing with which the Messiah now indicts them was also said long ago by Isaiah. Isaiah said that they despise the things of God: “They worship me in vain.” But Isaiah also said that they place great value on their own concerns: “They teach as commandments the teachings of human beings.” Therefore, it was on reasonable grounds that the disciples did not keep these teachings. Jesus thus strikes them with a mortal blow. He does this on the basis of the circumstances, on the basis of their own covenant to which they had consented, and on the basis of the prophet who had intensified the grounds of the accusation. He does not talk with the scribes at all because they had ceased to accept any more correction. Instead, he directed his message to the crowds so that he could introduce doctrine that is high and great and full of philosophical insight. He took this as his st...

John Chrysostom

AD 407
Do you see a prophecy in exact accordance with His sayings, and from the very first proclaiming beforehand their wickedness? For what Christ laid to their charge now, of this Isaiah also spoke from the very first; that the words of God they despise, for in vain do they worship me, says He; but of their own they make much account, teaching, says He, for doctrines the commandments of men. Therefore with reason the disciples keep them not. Having, you see, given them their mortal blow; and from the facts first, then from their own suffrage, then from the prophet having aggravated the charge, with them indeed He discourses not at all, incorrigibly disposed as they are now come to be, but directs His speech to the multitudes, so as to introduce His doctrine, great and high, and full of much strictness; and taking occasion from the former topic, He proceeds to insert that which is greater, casting out also the observance of meats. But see when. When He had cleansed the leper, when He h...

Theophylact of Ochrid

AD 1107
. Through the voice of the prophet Isaiah (Is. 29:13) Christ shows that the Pharisees and scribes are disposed to Him in the same way that they are to His Father. For they were evil, and by their evil deeds they had distanced themselves from God, and so were speaking the words of God only with their mouth. For it is utterly in vain for those who dishonor God by their deeds to worship Him and to believe that by so doing they honor Him.

Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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