I believe that if we can grasp and understand Leviticus, it is going to piece together the Old and the New Testament. There's a lot of times, like I had said, where Jesus, Paul, and Peter, and other apostles use language that is directly correlated to the law, or more specifically Leviticus. And I believe that if we see how it is being used in Leviticus and throughout the Old Testament, we can see how this more relates to us.
It unlocks why God gets mad at the Israelites, when even though they were following all of the laws, He still gets angry with them.