Concerning this Urim an d Thummim, which mean lights and perfections, no one alive can give any certain account. All that is said of them in scriptures leads to this conclusion, that when the high priest wore them, it was by way of testifying, that the people through him waited for the Lord's directions. Exodus 25:22. Thus Phinehas, Judges 20:27-28. And again Abiathar, 1 Samuel 23:9-12, etc. But was not the whole a symbolic reference to the person and offices of the Lord Jesus. Are not all revelations made in and by him? Is he not the gracious medium by whom prayers go up, and answers come down to all his people? Hebrews 1:2; John 1:18.
Related Commentaries of Exodus 28:30
Exodus 28:30
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.