What was the sin of Nadav and Avihu?

Who was indeed permitted to enter the Kodesh ha'Kodashim unconditionally?

Does this refer to the cloud of the Shechinah, or the cloud of smoke of the Ketores that the Kohen Gadol would bring before the Kapores (see 16:13)?

Why is "b'Zos" in the singular, rather than "b'Eilu" - with these Korbanos, in the plural?

Was Aharon ha'Kohen's permission to perform this service, and to enter the Kodesh ha'Kodashim, limited to Yom Kippur? Why was he granted this privilege? What aspects of the Avodah were for Yom Kippur only?

Why must the Kohen Gadol enter with only the four linen garments, rather than his usual eight?

How may we explain why the Kohen Gadol must sanctify himself, both when changing from the gold to the linen garments - and from the linen back to the gold?

Why is the Chatas of the Tzibur merely a goat, whereas that of the Kohen Gadol is a bull (16:3)? In Vayikra 4, the Chatas He'elem Davar of the Tzibur is equivalent to that of the Kohen Gadol (both are bulls)?

Why are both goats termed "Chatas," if only one will be chosen as an offering? What is the nature of a goat?

According to Rebbi (Yoma 70b), this is the same ram as that of the Korban Musaf (Bamidbar 29:8). Why is only the ram mentioned, whereas the other Musafim are not?

What does the Sa'ir la'Azazel symbolize? What is the literal translation of the word?

Why must the goat first be brought in to the Mikdash - only to be sent out?

Why must the Kohen Gadol start the Avodah of the Par, only to interrupt and offer the Ketores, and then return to sprinkling the blood? What about the principle, "we do not pass over Mitzvos"?

In what sense does Hashem "dwell with us, even amidst our impurities"? What is the specific connection to the sprinklings in the Ohel Mo'ed (i.e., the Kodesh)?

Wasn't the Kohen Gadol himself present? On what level was the Kohen Gadol while performing the Avodah? Were Mal'achim permitted to enter during the Avodah?

While the daily Ketores is being offered in the Kodesh, the Sages prohibited even standing in the Azarah between the Ulam and the Mizbe'ach. Why didn't they make a similar Gezerah on Yom Kippur?

What is the distinction between these terms of "Taharah" and "Kedushah"? What Halachah is derived from their juxtaposition, and what point of Musar?

If indeed Yisrael has sinned, how does the Sa'ir la'Azazel quiet the prosecution against them, and "bear away" the sins?

According to the Gemara (Yoma 32), the Kohen Gadol will only re-enter the Kodesh ha'Kodashim later in the day, after offering Korbanos in the Bigdei Zahav. Why must the Gemara interpret thus, and why does the Torah record it out of sequence?

Which Chatas does this refer to?

What is a reason that those involved in the Sa'ir la'Azazel, and the burning of the Chatas animals, become Tamei thereby?

How should a new Kohen Gadol be selected? Historically, how was the Kohen Gadol often appointed during the Second Temple period?

What is the significance of 'atoning for the transgressions of Yisrael, once in a year'?