I. The orders given concerning the altar of incense are, 1. That it was to be made of wood, and covered with gold, pure gold, about a yard high and half a yard square, with horns at the corners, a golden cornice round it, with rings and staves of gold, for the convenience of carrying it, Exo 30:1-5. It does not appear that there was any grate to this altar for the ashes to fall into, that they might be taken away; but, when they burnt incense, a golden censer was brought with coals in it, and placed upon the altar, and in that censer the incense was burnt, and with it all the coals were taken away, so that no coals nor ashes fell upon the altar. The measure of the altar of incense in Ezekiel's temple is double to what it is here (Eze 41:22), and it is there called an altar of wood, and there is no mention of gold, to signify that the incense, in gospel times, should be spiritual, the worship plain, and the service of God enlarged, for in every place incense should be offered, Mal 1:11. 2. That it was to be placed before the veil, on the outside of that partition, but before the mercy-seat, which was within the veil, Exo 30:6. For though he that ministered at the altar could not see the mercy-seat, the veil interposing, yet he must look towards it, and direct his incense that way, to teach us that though we cannot with our bodily eyes see the throne of grace, that blessed mercy-seat (for it is such a throne of glory that God, in compassion to us, holds back the face of it, and spreads a cloud upon it), yet we must in prayer by faith set ourselves before it, direct our prayer, and look up. 3. That Aaron was to burn sweet incense upon this altar, every morning and every evening, about half a pound at a time, which was intended, not only to take away the ill smell of the flesh that was burnt daily on the brazen altar, but for the honour of God, and to show the acceptableness of his people's services to him, and the pleasure which they should take in ministering to him, Exo 30:7, Exo 30:8. As by the offerings on the brazen altar satisfaction was made for what had been done displeasing to God, so, by the offering on this, what they did well was, as it were, recommended to the divine acceptance; for our two great concerns with God are to be acquitted from guilt and accepted as righteous in his sight. 4. That nothing was to be offered upon it but incense, nor any incense but that which was appointed, Exo 30:9. God will have his own service done according to his own appointment, and not otherwise. 5. That this altar should be purified with the blood of the sin-offering put upon the horns of it, every year, upon the day of atonement, Exo 30:10. See Lev 16:18, Lev 16:19. The high priest was to take this in his way, as he came out from the holy of holies. This was to intimate to them that the sins of the priests who ministered at this altar, and of the people for whom they ministered, put a ceremonial impurity upon it, from which it must be cleansed by the blood of atonement.
II. This incense-altar typified, 1. The mediation of Christ. The brazen altar in the court was a type of Christ dying on earth; the golden altar in the sanctuary was a type of Christ interceding in heaven, in virtue of his satisfaction. This altar was before the mercy-seat; for Christ always appears in the presence of God for us; he is our advocate with the father (Jo1 2:1), and his intercession is unto God of a sweet-smelling savour. This altar had a crown fixed to it; for Christ intercedes as king. Father, I will, Joh 17:24. 2. The devotions of the saints, whose prayers are said to be set forth before God as incense, Psa 141:2. As the smoke of the incense ascended, so much our desires towards God rise in prayer, being kindled with the fire of holy love and other pious affections. When the priest was burning incense the people were praying (Luk 1:10), to signify that prayer is the true incense. This incense was offered daily, it was a perpetual incense (Exo 30:8); for we must pray always, that is, we must keep up stated times for prayer every day, morning and evening, at least, and never omit it, but thus pray without ceasing. The lamps were dressed or lighted at the same time that the incense was burnt, to teach us that the reading of the scriptures (which are our light and lamp) is a part of our daily work, and should ordinarily accompany our prayers and praises. When we speak to God we must hear what God says to us, and thus the communion is complete. The devotions of sanctified souls are well-pleasing to God, of a sweet-smelling savour; the prayers of saints are compared to sweet odours (Rev 5:8), but it is the incense which Christ adds to them that makes them acceptable (Rev 8:3), and his blood that atones for the guilt which cleaves to our best services. And, if the heart and life be not holy, even incense is an abomination (Isa 1:13), and he that offers it is as if he blessed an idol, Isa 66:3.

An atonement - once in a year - On the tenth day of the seventh month. See Lev 16:18 (note), etc., and the notes there. See Clarke on Lev 16:21 (note), etc.

And Aaron shall make an atonement upon the horns of it once in a year,.... On the day of atonement, as the Targum of Jonathan, and so Jarchi and Aben Ezra explain it; and the atonement here referred to seems to be an atonement for the altar itself, see Lev 16:18 and as the altar of burnt offering was first expiated and then used, Exo 29:36 so it seems the altar of incense had not only an atonement made on it, but for it: and this was done

with the blood of the sin offering of atonement; by sprinkling the blood of that offering upon the horns of it, as we learn from the afore mentioned place; and this shows that Christ's mediation and intercession is founded upon the virtue of his blood, and the efficacy of his atoning sacrifice, see Jo1 2:1.

once in the year shall he make atonement upon it, throughout your generations; which proves the insufficiency of all legal sacrifices of themselves to take away sin, since every year, as the apostle observes, there was a remembrance of it, Heb 10:3.

it is most holy unto the Lord; either the atonement made on the day of atonement, which was a most holy part of service, and pointed at the great atonement made by the most Holy One, the Son of God; or this altar thus expiated, and devoted to sacred use, was reckoned a most sacred one to the Lord, and so was to have nothing offered upon it but what he ordered; with which Jarchi agrees in his note,"the altar is sanctified to these things only, and not to any other service.''

Ye shall offer no strange incense--that is, of a different composition from that of which the ingredients are described so minutely.