Summary: Christ is the High Priest and He enters into our lives and inside our spirits he makes intercession to God for us.
Exod 28:4 And these [are] the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest’s office.
Exod 28:15-24 And thou shalt make the breastplate of judgment with cunning work; after the work of the ephod thou shalt make it; [of] gold, [of] blue, and [of] purple, and [of] scarlet, and [of] fine twined linen, shalt thou make it. Foursquare it shall be [being] doubled; a span [shall be] the length thereof, and a span [shall be] the breadth thereof. And thou shalt set in it settings of stones, [even] four rows of stones: [the first] row [shall be] a sardius, a topaz, and a carbuncle: [this shall be] the first row. And the second row [shall be] an emerald, a sapphire, and a diamond. And the third row a ligure, an agate, and an amethyst. And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings. And the stones shall be with the names of the children of Israel, twelve, according to their names, [like] the engravings of a signet; every one with his name shall they be according to the twelve tribes. And thou shalt make upon the breastplate chains at the ends [of] wreathen work [of] pure gold. And thou shalt make upon the breastplate two rings of gold, and shalt put the two rings on the two ends of the breastplate. And thou shalt put the two wreathen [chains] of gold in the two rings [which are] on the ends of the breastplate.
Exod 28:28-29 And they shall bind the breastplate by the rings thereof unto the rings of the ephod with a lace of blue, that [it] may be above the curious girdle of the ephod, and that the breastplate be not loosed from the ephod. And Aaron shall bear the names of the children of Israel in the breastplate of judgment upon his heart, when he goeth in unto the holy [place], for a memorial before the LORD continually.
Aaron was the first High Priest of Israel.
Once every year he entered the most holy place in behalf of the people of Israel.
Part of his garments were a breastplate that he wore over his heart.
Twelve precious stones were upon this breastplate each with a different name of the tribes of Israel upon it.
And it is said that Aaron bore the names of the children of Israel upon his heart when he went into the holy place.
He represented the real High priest who was yet to come.... Jesus Christ.
Hebr 2:17 Wherefore in all things it behoved him to be made like unto [his] brethren, that he might be a merciful and faithful high priest in things [pertaining] to God, to make reconciliation for the sins of the people.
Hebr 3:1 Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus;
And we read that we are upon his heart also.
Hebr 4:15 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as [we are, yet] without sin.