בזאת יבוא אהרן אל הקדש בפר בן בקר לחטאת ואיל לעולה ... ומאת עדת בני ישראל יקח שני שעירי עזים.
Chazal (Midrash Rabbah, Vayikra 21:11) state that the three korbanos, offerings, that were brought on Yom Kippur represented the three Avos, Patriarchs. The young bull that served as a korban chatas, sin-offering, represented Avraham Avinu. The ram that was used as a korban olah, elevation-offering, symbolized Yitzchak Avinu. The two he-goats denoted Yaakov Avinu. When the Kohen Gadol entered the Sanctuary, he did so b’z’chus, in the merit of, the three korbanos that he brought. Avraham Avinu sacrificed himself, manifesting extreme devotion, for the purpose of bringing a pagan world closer to Hashem. His love for people and his constant…