Exodus 28:30
And thou shalt put in the breastplate of judgment the Urim and the Thummim; and they shall be upon Aaron's heart, when he goeth in before the LORD: and Aaron shall bear the judgment of the children of Israel upon his heart before the LORD continually.
And thou shall put in the breastplate of judgment the Urim and the Thummim,.... What these interpreters are at a loss about, both Jewish and Christian; some have confessed their ignorance of them, have conjectured they were only these two words and put in the duplicature of the breastplate; that the name of Jehovah, with other divine were put there and so called; and some have that they were little images, the same with the teraphim, the high priest carried in the folds of breastplate, by which consultation was made; others have thought them to be a work purely divine, of Jehovah's putting there; for my own part I am to follow Josephus {x}, who takes them to be the same with the twelve stones; and it is observable that where the stones are mentioned nothing is said of the Urim and Thummim, and where the Urim and Thummim are observed, no notice is taken of the stones, see Exodus 39:10 the use of these was to have the names of the children of Israel engraven upon them, and so be borne on the heart of Aaron when he went into the holy place, as is here said of the Urim and Thummim; and that consultation might be made by them in matters of moment and difficulty, as appears from various other passages of the Scripture,
Numbers 27:21 and but in what manner this was done, and in what way the answer was given and understood, are not easily accounted for: some say, by the brightness or protuberance of the letters on the stones; others, by the shining and splendour of the stones, which is more probable; others, by an inward impression on the mind of the priest; and others, by an articulate voice, which seems best of all: the Septuagint render these two words "manifestation and truth"; and Aelianus {y} reports, that the chief and oldest among the Egyptian priests and judges wore an image of a sapphire stone about his neck, which they called "truth": and, according to Diodorus Siculus {z}, this image was of more precious stones than one; for he says, the president in the Egyptian courts of judicature had on his neck, hanging on a golden chain, an image of precious stones, which they called truth: but there is no reason to believe that this custom was as ancient as the times of the Israelites in Egypt, or that they borrowed this from them; but rather, that the Egyptians did this in imitation of what the high priest among the Jews wore, which they might learn from the Jews in Solomon's time, or in later ages; the words Urim and Thummim signify "lights and perfections", agreeably to which is the paraphrase of Jonathan;
"Urim, which enlighten their words, and manifest the hidden things of the house of Israel, and Thummim, which perfect their works, by the high priest, who seeks instruction from the Lord by them:''
they were typical of Christ, in whom all lights and perfections are; all light is in him; the light of nature and reason is from him, as the Creator, and is given to every man that comes into the world; the light of grace is with him, and communicated to all his people at conversion, and in all the after degrees and supplies of it; all light and knowledge in divine things is from him, the knowledge of God, of himself, and of the Gospel, and the truths of it; and the light of glory will be from him: all the perfections of deity, the whole fulness of the Godhead, all human perfections, which make him as man in all things like unto us, but far exceeding us; as Mediator, all the blessings and promises of the covenant are in him; all the gifts of the Spirit, and a fulness of all grace; there are in him perfect righteousness, perfect holiness, all light, life, strength, wisdom, joy, and comfort {a}: and these stones, or Urim and Thummim, may be an emblem also of the saints, being made light and perfect righteousness in Christ, from whom they have both:
and they shall be upon Aaron's heart, when he goeth in before the LORD; either into the holy or into the most holy place, just as the names of the children of Israel on the stones are said to be,
See Gill on "Exodus 28:29",
and Aaron shall bear the judgment of the children of Israel upon his heart before the LORD continually; not only bear their names and remember their cases, make intercession for them, and represent their persons, in all which he was a type of Christ, but bear their judgment, have that at heart, and administer it unto them; and in all doubtful and difficult cases inquire of God what was fit and right to do for them, or for them to do: so Christ has the government of his people both at heart and in his hands; all judgment is committed to him, and he is the righteousness of his people now, and will be their Judge hereafter.
{x} Antiqu. l. 3. c. 7. sect. 5.
{y} Var. Hist. l. 14. c. 34.
{z} Bibliothec. l. 1. p. 68.
{a} See a Discourse of mine, called Levi's Urim and Thummim, found with Christ, &c. published in 1725.