The 8 garments of Kohen Gadol (High Priest, Aaron) and 4 garments of simple Kohen are significant in their work of the Kohen to draw the Light to this world. Total number of garments is 12, which is very significant. The breast plate also has 12 stones. 12 permutations of the יהוה YHVH, 12 tribes, 12 months and 12 signs of the Zodiac. The Tabernacle was initiated on Rosh Chodesh Nissan, which is the first month of the year.
God instructs Moshe to teach Aaron and his sons all that they need to know, serving and drawing the light to remove all negativity and impurities from the Israelites. God also warns the Kohen to strictly follow the rules or he may die. The description of the Kohen’s clothing includes little bells that he should have hanging on his garment while serving in the Holy of hollies.
The Kohen’s work was actually for the entire world. He put himself in great risk going into the Holy of Hollies during his work of drawing the light to the world. If the High priest had little impurity or didn’t follow the proper procedure he would die right in the Holy of Hollies. When he went inside he had to focus his consciousness on the holy action. It had to be in a high and pure spiritual form. Losing focus to the body consciousness would create limitation and if it happened for one split second the high and pure force of the Light would burn him. History tells us that before the destruction of the temples many priests died when they went into the Holy of Hollies.
The children of Israel need to be “ממלכת־כהנים־וגוי־קדוש”, “a nation of priests and holy nation”. Our duty is to be pure and serve as a channel for the whole world. (That is why Israelites are spread all over the world.).
I found a rare location in the Zohar (Terumah #849) where the Zohar differentiates between the tribe of Judah and Israelites. It tells about the greater responsibility of the Jews.
The source of the name Jew, Jewish came from the name of the tribe ofיהודה Yehuda (Judha, Judean, Jew, Jewish). The tribes of Judah and Benjamin were the only two tribes left in the a Holy Land after the exile of the 10 tribes. Their land was called the land of Judah, יהודה and a person of that tribe was called יהודי (translated to Jew). The Jews have greater responsibility because they stayed in the land for a longer time and went through the experience of the destruction of both Holy Temples. They should lead the world into the light just like the work of the High Priests.