Yom haKippurim (the Day of Coverings/Atonement) is seen as a time of self-reflection. Yes, in Leviticus 16 God teaches that one is to “afflict your souls,” which is taken to be a call for a fast, as seen in Isaiah 58. However, the apostolic letter to the Hebrews shows that the day is about reflection on the High Priest Who atoned God’s people once and for all time with His own blood.