I. He shows them that obedience was the only thing he required of them, v. 22, 23. He appeals to the original contract, by which they were first formed into a people, when they were brought out of Egypt. God made them a kingdom of priests to himself, not that he might be regaled with their sacrifices, as the devils, whom the heathen worshipped, which are represented as eating with pleasure the fat of their sacrifices and drinking the wine of their drink-offerings, Deut. xxxii. 38. No: Will God eat the flesh of bulls? Ps. l. 13. I spoke not to your fathers concerning burnt-offerings or sacrifices, not of them at first. The precepts of the moral law were given before the ceremonial institutions; and those came afterwards, as trials of their obedience and assistances to their repentance and faith. The Levitical law begins thus: If any man of you will bring an offering, he must do so and so (Lev. i. 2, ii. 1), as if it were intended rather to regulate sacrifice than to require it. But that which God commanded, which he bound them to by his supreme authority and which he insisted upon as the condition of the covenant, was, Obey my voice; see Exod. xv. 26, where this was the statute and the ordinance by which God proved them: Hearken diligently to the voice of the Lord thy God. The condition of their being God's peculiar people was this (Exod. xix. 5), If you will obey my voice indeed. "Make conscience of the duties of natural religion, observe positive institutions from a principle of obedience, and then I will be your God and you shall be my people," which is the greatest honour, happiness, and satisfaction, that any of the children of men are capable of. "Let your conversation be regular, and in every thing study to comply with the will and word of God; walk within the bounds that I have set you, and in all the ways that I have commanded you, and then you may assure yourselves that it shall be well with you." The demand here is very reasonable, that we should be directed by Infinite Wisdom to that which is fit, that he that made us should command us, and that he should give us law who gives us our being and all the supports of it; and the promise is very encouraging: Let God's will be your rule and his favour shall be your felicity.