10:12-20 Afflictions should rather quicken us to our duty, than take us from it. But our unfitness for duty, when it is natural and not sinful, will have great allowances made for it; God will have mercy, and not sacrifice. Let us profit by the solemn warning this history conveys. When professing worshippers come with zeal without knowledge, carnal affections, earthly, light, vain, trifling thoughts, the devices of will-worship, instead of the offering of soul and spirit; then the incense is kindled by a flame which never came down from heaven, which the Spirit of a holy God never sent within their hearts.
16-20. Moses diligently sought the goat of the sin offering, and, behold, it was burnt—In a sacrifice presented, as that had been, on behalf of the people, it was the duty of the priests, as typically representing them and bearing their sins, to have eaten the flesh after the blood had been sprinkled upon the altar. Instead of using it, however, for a sacred feast, they had burnt it without the camp; and Moses, who discovered this departure from the prescribed ritual, probably from a dread of some further chastisements, challenged, not Aaron, whose heart was too much lacerated to bear a new cause of distress but his two surviving sons in the priesthood for the great irregularity. Their father, however, who heard the charge and by whose directions the error had been committed, hastened to give the explanation. The import of his apology is, that all the duty pertaining to the presentation of the offering had been duly and sacredly performed, except the festive part of the observance, which privately devolved upon the priest and his family. And that this had been omitted, either because his heart was too dejected to join in the celebration of a cheerful feast, or that he supposed, from the appalling judgments that had been inflicted, that all the services of that occasion were so vitiated that he did not complete them. Aaron was decidedly in the wrong. By the express command of God, the sin offering was to be eaten in the holy place; and no fanciful view of expediency or propriety ought to have led him to dispense at discretion with a positive statute. The law of God was clear and, where that is the case, it is sin to deviate a hair's breadth from the path of duty. But Moses sympathized with his deeply afflicted brother and, having pointed out the error, said no more.