Leviticus is a tangible, practical manual so that the Israelites know how to function with God on a regular basis.
God wants the obedience not just sacrifice.
The priests have to distinguish between holy and common, clean and unclean. Israel is supposed to be holy and function as a clean nation not as an unclean nation.
The role of the priests expands, defining clean and unclean skin diseases for God’s people.
