For Reflection/Discussion: What is Yom Kippur? Why is Yom Kippur counted as a High Holy Day? How would you define atonement? What role, if any, did the Old Testament sacrificial system play in atoning for sin? How does the author of Hebrews understand the sacrificial system? Why were two goats used in the Temple ceremony on the Day of Atonement? How do Christians atone for their sin?