God’s plan has always been to be in communion with humanity. Humans are “image-bearers” of God, called to find their identity and purpose in him. Yet, despite the perfection of their union with God in the Garden, Adam and Havah (Eve) were tempted and rejected the Lord’s commands. As he did for them with the “garments of skin,” God has provided a covering (kapparah) for humanity’s nakedness, humanity’s sin. This covering was a symbol that through the sacrifices to come – and in the coming Messiah – humanity would be freed from its brokenness, sin and shame (CJB)
Yom-Kippur ‘Day of Atonement’
26 Adonai said to Moshe, 27 “The tenth day of this seventh month is Yom-Kippur; you are to have a holy convocation, you are to deny yourselves, and you are to bring an offering made by fire to Adonai. 28 You are not to do any kind of work on that day, because it is Yom-Kippur, to make atonement for you before Adonai your God.
29 Anyone who does not deny himself on that day is to be cut off from his people; 30 and anyone who does any kind of work on that day, I will destroy from among his people. 31 You are not to do any kind of work; it is a permanent regulation through all your generations, no matter where you live. 32 It will be for you a Shabbat of complete rest, and you are to deny yourselves; you are to rest on your Shabbat from evening the ninth day of the month until the following evening.” Lev 23:26-32