Yom Kippur or the Day of Atonement is the holiest day of the Jewish calendar. It is part of the fall feasts occurring on the 10th day of Tishri. The High Priest is only able to enter into the Holy of Holies once a year after much preparation. On this day there are many rituals that the High Priest must due to enter into the Holy of Holies. This ritual is repeated each year as blood from bulls and goats can’t eternally atone for sins. The book of Hebrews points out that Jesus replaces the old covenant and all of the blood offerings point to Jesus payment on the cross.
On the Day of Atonement, there are 2 goats, one goat to be the sacrifice and the second goat to be the scapegoat. The first goat is slaughtered for the sins of Israel and then sprinkled on the ark to appease the wrath of God for another year. The scapegoat removed the sins of the people into the wilderness where they are forgotten. Jesus fulfills the the roll of both of the goats. He is our blood sacrifice and He also removes our sins so they are remembered no more.
12 For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
Heb 8:12 (KJV)
29 The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.
John 1:29 (KJV)
This shows the completeness of Jesus sacrifice, he fulfilled both roles, not only one roll. Jesus is our High Priest, our sacrificial lamb and He takes away our sins to be remembered no more.
The thing that I find so fascinating is how the Law in every way is fulfilled by Jesus, therefore making Him our New Covenant.