Draweth nigh unto me with their mouth - That is, they are regular in the forms of worship; they are strict in ceremonial observances, and keep the law outwardly; but God requires the heart, and that they have not rendered.

Their heart is far from me - The true worship of God consists in the union of the heart to him - where this exists not, a particle of the spirit of devotion cannot be found.
This people draweth nigh unto me with their mouth - This clause, which is taken from Isaiah 29:13, is omitted by several excellent MSS., and by several versions and fathers. Erasmus, Mill, Drusius, and Bengel, approve of the omission, and Griesbach has left it out of the text; but as I find it in the prophet, the place from which it is quoted, I dare not omit it, howsoever respectable the above authorities may appear.

This people draweth nigh unto me with their mouth,.... The preface to these words, or the form in which they are introduced by the prophet; "wherefore the Lord said", is left out in this citation, being unnecessary here, though of the greatest importance there; partly to show, that what was about to be said, was not the prophet's own words, but the words of the Lord, of which the Jews in Christ's time made no doubt; and partly to give a reason why that judicial blindness, threatened in the context, should be inflicted on them, which is no part of Christ's design here; but which is only to show, that the description here given exactly agrees with them, and so proves, and confirms the character he gives of them as hypocrites. They approached the ordinances of God, and drew nigh to him, and attended him in outward worship; they prayed unto him publicly, and constantly, in the streets, in the synagogues, and temple, and with much seeming devotion and sanctity:
and honoureth me with their lips: they owned him to be their creator and preserver; they made their boast of him, and of their knowledge of him, as the one only living, and true God, and as the God of Israel; they brought their sacrifices of praise and thanksgiving, even the fruit of their lips, unto him, for their many peculiar mercies, privileges, and favours, as a nation, church, and people, and with much seeming sincerity and affection.
But their heart is far from me; they had no true love to God, nor faith in him, nor fear of him; they were not at all concerned for his presence with them, or for communion with him, or for his honour and glory; their hearts were in the world, and after their covetousness; they made religion a tool to their secular purposes, supposing gain to be godliness; sought the applause of men, and contented themselves with bodily exercise; having no regard to internal religion, powerful godliness, or where their hearts were, so be it, their bodies were presented to God in public worship; and what they did it was to be seen and approved of men, not caring what the searcher of hearts knew concerning them, or what he required of them.

This people draweth nigh unto me with their mouth, &c.--By putting the commandments of men on a level with the divine requirements, their whole worship was rendered vain--a principle of deep moment in the service of God. "For," it is added in Mark 7:8, "laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups; and many other such like things ye do." The drivelling nature of their multitudinous observances is here pointedly exposed, in contrast with the manly observance of "the commandment of God"; and when our Lord says, "Many other such like things ye do," it is implied that He had but given a specimen of the hideous treatment which the divine law received, and the grasping disposition which, under the mask of piety, was manifested by the ecclesiastics of that day.

This people. The Jews. Matthew 15:8-9 are the quotation from Isaiah.
Their heart is far from me. The essential of true worship is that the heart be wholly given to God. Even the forms commanded by God are worthless unless they are obeyed from the heart.

Their heart is far from me - And without this all outward worship is mere mockery of God. Isaiah 29:13.