This week's learning is sponsored by Sarah Zahavi to the continued health and good outcome for Chesya Rut bat Chana. 

The Mishna explains that Yom Kippur atones for positive commandments. If one has already repented, they receive atonement immediately. Therefore, it is assumed that the Mishna is referring to one who has not yet repented. This accords with the opinion of Rebbi who holds that Yom Kippur atones even for sins for which one has not yet repented. The rabbis disagree and hold that Yom Kippur only atones for sins if one has repented. A difficulty is raised as the next part of the Mishna accords with Rabbi Yehuda's position that the goat sent to Azazel atones for kohanim as well. This issue is resolved - both parts of the Mishna are attributed to Rebbi, and on the issue of the goat to Azazel, he adopts Rabbi Yehuda's position.

Abaye asked Rav Yosef if Rabbi Yehuda holds by Rebbi's position regarding one who did not repent before Yom Kippur. Rav Yosef explains that he does not and brings a source from Safra to support his answer, as it is known that an unattributed Safra is assumed to be authored by Rabbi Yehuda.

There is a contradiction between two different sources in the Safra - one says that Yom Kippur atones even without repentance and the other says it only atones with repentance. Abaye and Rava each resolve the contradiction differently.

Rabbi Yehuda and Rabbi Shimon disagree about which sacrifices on Yom Kippur atone for all the kohanim's sins - the goat that is sent to Azazel or the bull of the high priest. What is the basis in the verses in the Torah for each of the approaches?

A braita is brought regarding which sacrifice atones for the sins of the kohanim. Rava and Abaye disagree about whether the braita's author is Rabbi Shimon or Rabbi Yehuda.