In the 4th aliyah of Parshas Shemini, Moshe instructs Aharon and his sons to eat the leftovers of the meal offering. The term nosarim, leftovers, is used in reference to Aharon's remaining sons, and the remainder of the korban. This term refers to something which should not have remained. Although Aharon should have been destroyed because of his involvement in chet ha'egel, not only was he spared, but he was chosen to be the Kohen Gadol. Aharon's critical role reflects our ability to do teshuva from ahavah (love), turning the very act of sin into a positive aspect for our merit.