In Leviticus 3-4 we read of the peace and sin offerings. The peace offering could be public or private, for giving thanks, dedicating a vow, or a voluntary offering. The sin offering was either communal or individual, in response to a specific sin. There were various animals that could be offered, each with their own specific instructions.
For the Israelite, sin either intentional or unintentional required a sacrifice. Sin could not be ignored or hidden. These animal sacrifices could not take away sin; they were merely a consequence.
By contrast, we “are the body of Christ and individually members of it”. Hebrews tells us that “we have been sanctified through the offering of the body of Jesus Christ once for all”, a more perfect sacrifice that allows us to have a relationship with God based on love rather than payment. Rather than sacrifice, it is up to us to “have the same care for one another” for members of the body, to show God’s love to each other.