Sacrifice

Leviticus is the central book of the Torah and as such is arguably the most important. This is where God tells humanity how He wants to be approached and how we safely can interact with Him. The book begins with sacrifice. Contrary to the perception of many, most of the sacrifices in the Tabernacle had nothing to do with sin. Those that did concern sin only covered unintentional sins. As such they do not conflict with the work of Christ in any way.