(Mishnah): A Kohen Gadol serves in eight Kelim, and a Hedyot in four - Kesones (cloak), underpants, turban and sash. A Kohen Gadol has four more - Choshen, Efod, Me'il and Tzitz.

With these he is asked [to be answered through] the Urim v'Tumim.

We do not ask for a commoner, only for a king, Beis Din, or someone whom the Tzibur needs.

(Gemara) Question: Why does a Kohen Gadol serve in eight Kelim?

Answer (R. Chananyah, the colleague of Rabanan): This corresponding to Bris Milah, which is on the eighth day - "Brisi Haysah Ito.''

Question: Why doesn't he serve in the gold garments [in Kodesh ha'Kodoshim]?

Answer #1: It is due to pride.

Answer #2 (R. Simon): It is due to "Al Tis'hader Lifnei Melech.''

Answer #3 (R. Levi): The prosecutor cannot become the advocate. Yesterday (i.e. in the past) it says about [Yisrael] "va'Ya'asu Lahem Elohei Zahav'', and now he stands and serves in gold garments?!

(Beraisa - R. Chiyah): "U'Levesham'' - u'Valu Sham (they will wear away there). There they will be buried, there they will decay, and they are not Kosher for the coming Yom Kipur.

(Beraisa - R. Dosa): They are Kosher for a Kohen Hedyot.

(Beraisa - Rebbi): There are two refutations of this - one due to Bigdei Kohen Gadol (we may not descend in Kedushah to use them for a Hedyot), and one due to Bigdei Kohen Hedyot (his sash is different, like we explain now);

(Beraisa): Rebbi and R. Elazar bei R. Shimon did not argue about the sash of a Kohen Gadol [in Bigdei Lavan] on Yom Kipur, that it is of [pure] linen, and about the rest of the year, that it is of Kil'ayim (wool and linen);

What did they argue about? They argued about the sash of a Kohen Hedyot. Rebbi says that it has Kil'ayim, and R. Elazar bei R. Shimon says that it has no Kil'ayim.

(R. Yakov bar Acha citing R. Avahu citing R. Yochanan): Rebbi learns from "v'Asisa l'Aharon ul'Vanav Kachah k'Chol Asher Tzivisi Osachah'' - just like Aharon's garments have Kil'ayim, also his sons' garments have Kil'ayim.

How does R. Elazar bei R. Shimon expound this? Just like Aharon [wears garments] proper for him, also his sons [wear garments] proper for them.