The Feasts of Unleavened Bread, Shavuot and Yom Kippur work together to take us from death to life. The seven Feasts together are a coordinated effort and show us the many aspects of our salvation process.
What is the purpose of Yom Kippur? Is about cleansing or is it for national forgiveness? Perhaps it is both.
What does Yom Kippur have to do with the Bride?