Summa Theologica I-II, q. 102: Of the Causes of the Ceremonial Precepts
Another literal signification may be assigned. For the ark contained the tables of the Law, in order to prevent forgetfulness of the Law, wherefore it is written (Ex. 24:12): "I will give thee two tables of stone, and the Law, and the commandments which I have written: that thou mayest teach them" to the children of Israel. The rod of Aaron was placed there to restrain the people from insubordination to the priesthood of Aaron; wherefore it is written (Num. 17:10): "Carry back the rod of Aaron into the tabernacle of the testimony, that it may be kept there for a token of the rebellious children of Israel." The manna was kept in the ark to remind them of the benefit conferred by God on the children of Israel in the desert; wherefore it is written (Ex. 16:32): "Fill a gomor of it, and let it be kept unto generations to come hereafter, that they may know the bread wherewith I fed you in the wilderness." The candlestick was set up to enhance the beauty of the temple, for the magnificence of a house depends on its being well lighted. Now the candlestick had seven branches, as Josephus observes (Antiquit. iii, 7,8), to signify the seven planets, wherewith the whole world is illuminated. Hence the candlestick was placed towards the south; because for us the course of the planets is from that quarter. The altar of incense was instituted that there might always be in the tabernacle a sweet-smelling smoke; both through respect for the tabernacle, and as a remedy for the stenches arising from the shedding of blood and the slaying of animals. For men despise evil-smelling things as being vile, whereas sweet-smelling things are much appreciated. The table was placed there to signify that the priests who served the temple should take their food in the temple: wherefore, as stated in Mat. 12:4, it was lawful for none but the priests to eat the twelve loaves which were put on the table in memory of the twelve tribes. And the table was not placed in the middle directly in front of the propitiatory, in order to exclude an idolatrous rite: for the Gentiles, on the feasts of the moon, set up a table in front of the idol of the moon, wherefore it is written (Jer. 7:18): "The women knead the dough, to make cakes to the queen of heaven."
In the court outside the tabernacle was the altar of holocausts, on which sacrifices of those things which the people possessed were offered to God: and consequently the people who offered these sacrifices to God by the hands of the priest could be present in the court. But the priests alone, whose function it was to offer the people to God, could approach the inner altar, whereon the very devotion and holiness of the people was offered to God. And this altar was put up outside the tabernacle and in the court, to the exclusion of idolatrous worship: for the Gentiles placed altars inside the temples to offer up sacrifices thereon to idols.
The figurative reason for all these things may be taken from the relation of the tabernacle to Christ, who was foreshadowed therein. Now it must be observed that to show the imperfection of the figures of the Law, various figures were instituted in the temple to betoken Christ. For He was foreshadowed by the "propitiatory," since He is "a propitiation for our sins" (1 Jn. 2:2). This propitiatory was fittingly carried by cherubim, since of Him it is written (Heb. 1:6): "Let all the angels of God adore Him." He is also signified by the ark: because just as the ark was made of setim-wood, so was Christ's body composed of most pure members. Moreover it was gilded: for Christ was full of wisdom and charity, which are betokened by gold. And in the ark was a golden pot, i.e. His holy soul, having manna, i.e. "all the fulness of the Godhead" (Col. 2:9). Also there was a rod in the ark, i.e. His priestly power: for "He was made a. . . priest for ever" (Heb. 6:20). And therein were the tables of the Testament, to denote that Christ Himself is a lawgiver. Again, Christ was signified by the candlestick, for He said Himself (Jn. 8:12): "I am the Light of the world"; while the seven lamps denoted the seven gifts of the Holy Ghost. He is also betokened in the table, because He is our spiritual food, according to Jn. 6:41, 51: "I am the living bread": and the twelve loaves signified the twelve apostles, or their teaching. Or again, the candlestick and table may signify the Church's teaching, and faith, which also enlightens and refreshes. Again, Christ is signified by the two altars of holocausts and incense. Because all works of virtue must be offered to God through Him; both those whereby we afflict the body, which are offered, as it were, on the altar of holocausts; and those which, with greater perfection of mind, are offered to God in Christ, by the spiritual desires of the perfect, on the altar of incense, as it were, according to Heb. 13:15: "By Him therefore let us offer the sacrifice of praise always to God."
Reply to Objection 7The Lord commanded an altar to be made for the offering of sacrifices and gifts, in honor of God, and for the upkeep of the ministers who served the tabernacle. Now concerning the construction of the altar the Lord issued a twofold precept. One was at the beginning of the Law (Ex. 20:24, seqq.) when the Lord commanded them to make "an altar of earth," or at least "not of hewn stones"; and again, not to make the altar high, so as to make it necessary to "go up" to it "by steps." This was in detestation of idolatrous worship: for the Gentiles made their altars ornate and high, thinking that there was something holy and divine in such things. For this reason, too, the Lord commanded (Dt. 16:21): "Thou shalt plant no grove, nor any tree near the altar of the Lord thy God": since idolaters were wont to offer sacrifices beneath trees, on account of the pleasantness and shade afforded by them. There was also a figurative reason for these precepts. Because we must confess that in Christ, Who is our altar, there is the true nature of flesh, as regards His humanity—and this is to make an altar of earth; and again, in regard to His Godhead, we must confess His equality with the Father—and this is "not to go up" to the altar by steps. Moreover we should not couple the doctrine of Christ to that of the Gentiles, which provokes men to lewdness.
But when once the tabernacle had been constructed to the honor of God, there was no longer reason to fear these occasions of idolatry. Wherefore the Lord commanded the altar of holocausts to be made of brass, and to be conspicuous to all the people; and the altar of incense, which was visible to none but the priests. Nor was brass so precious as to give the people an occasion for idolatry.