Since Adam and Eve were first cast out of the Garden, we have been separated from God by sin. The burnt offering was a ritual that was called for wherever the people of God were reminded of sin and living in a world characterized by sin. The animal they offered took their place and their sins were wiped away. This pointed forward to Jesus who was the True burnt offering in whom we worship through confession, receiving forgiveness and devotion. - Leviticus 1:1-17