1. What the covenant was that God made with them, and upon what terms they should obtain his favour and be accepted of him (v. 6): I desired mercy and not sacrifice (that is, rather than sacrifice), and insisted upon the knowledge of God more than upon burnt-offerings. Mercy here is the same word which in v. 4 is rendered goodness—chesed—piety, sanctity; it is put for all practical religion; it is the same with charity in the New Testament, the reigning love of God and our neighbour, and this accompanied with and flowing from the knowledge of God, as he has revealed himself in his word, a firm belief that he is, and is the rewarder of those that diligently seek him, a good affection to divine things guided by a good judgment, which cannot but produce a very good conversation; this is that which God by his covenant requires, and not sacrifice and offering. This is fully explained, Jer. vii. 22, 23. I spoke not to your fathers concerning burnt-offerings (that was the smallest of the matters I spoke to them of, and on which the least stress was laid), but this I said, Obey my voice, Mic. vi. 6-8. To love God and our neighbour is better than all burnt offering and sacrifice, Mark xii. 33; Ps. li. 16, 17. Not but that sacrifice and offering were required, and to be paid, and had their use, and, when they were accompanied with mercy and the knowledge of God, were acceptable to him, but, without them, God regarded them not, he despised them, Isa. i. 10, 11. Perhaps this is mentioned here to show a difference between the God whom they deserted and the gods whom they went over to. The true God aimed at nothing but that they should be good men, and live good lives for their own good, and the ceremony of honouring him with sacrifices was one of the smallest matters of his law; whereas the false gods required that only; let their priests and altars be regaled with sacrifices and offerings, and the people might live as they listed. What fools were those then that left a God who aimed at giving his worshippers a new nature, for gods who aimed at nothing but making themselves a new name! It is mentioned likewise to show that God's controversy with them was not for the omission of sacrifices (I will not reprove thee for them, Ps. l. 8), but because there was no justice, nor mercy, nor knowledge of God, among them (ch. iv. 1), and to teach us all that the power of godliness is the main thing God looks at and requires, and without it the form of godliness is of no avail. Serious piety in the heart and life is the one thing needful, and, separate from that, the performances of devotion, though ever so plausible, ever so costly, are of no account. Our Saviour quotes this to show that moral duties are to be preferred before rituals whenever they come in competition, and to justify himself in eating with publicans and sinners, because it was in mercy to the souls of men, and in healing on the sabbath day, because it was in mercy to the bodies of men, to which the ceremony of singularity in eating and the sabbath-rest must give way, Matt. ix. 13; xii. 7.