And so shall [the high priest] do for the Tent of Meeting, which
dwells amongst them in the midst of their defilement
Also when the people of Israel are in a state of defilement, the Divine
Presence dwells with them.
For on this day, He shall atone for you
On Yom Kippur, the day itself atones... as it is written, "For on this day...
shall atone for you."