Karetot 7: Repentance Without Atonement on Yom Kippur?

In daf 6, we learned more about the ingredients mixed together to create the anointing oil.  Today's daf considers the process of atonement, particularly on Yom Kippur.  The rabbis discuss whether or not one might be atoned simply by participating in the Yom Kippur rituals even if s/he is not repentant.  

A baraita compares Yom Kippur to sin offerings and guilt offerings.  These will only bring on atonement if the person who brings them has the proper intention during the sacrifices.  A different baraita loots to Vayikra (23:28) where we are made to understand that even if one works and does not fast on Yom Kippur is forgiven on Yom Kippur.

Abaye says that there is no contradiction between these two baraitot; We cannot apply the punishment of karet to sins that violate Yom Kippur when these sins are listed at the beginning of Massekhet Karetot.  The rabbis ask how atonement might happen without repentance.  Rambam's Hilkhot Teshuva (1:1-3) shares that there must be repentance in order for atonement to be granted.  

When the Temple stood, the High Priest represented the people on Yom Kippur when bringing the se'er ha'mishtale'ach, the scapegoat, to be thrown from the cliff to Azazel (Vayikra 16:5-22).  The High Priest would recite the viduey, confessional, as a formula.  Now that the Temple and the High Priest are gone, we are each responsible for our own repentance.