More on aspects of Temple worship that are not essential to each other. Also, the treatment of the Temple offerings for Rosh Chodesh from the Book of Yehezkel (Ezekiel) - which is not the same thing as that which is commanded in the Torah. And once the Gemara is talking about a source from Ezekiel, it opens the discussion to other challenges -- including an important story of Rabbi Haninah ben Hizkiyah and how he explained all of the difficult passages of Ezekiel. Plus, a new mishnah! Bringing us back to the discussion of essentiality. With an atypical dispute in the mishnah itself - given the explanations for the respective opinions: Rabbi Akiva, Rabbi Shimon ben Nanas, and Rabbi Shimon.