Holiness meant both separation and dedication to the LORD, and God promised spectacular blessings for obedience. One Israelite obeyed and merited all these blessings.
Purification laws looked ahead to Christ who embodied the purity these laws were meant to symbolize. Aaron was a symbolic high priest whose role Jesus would execute perfectly as our true high priest, representing and serving us as our advocate and intercessor before the Father.
Leviticus reveals to us in pictures, symbols, and shadows the ultimate and the only efficacious sacrifice of Jesus who takes away the sin of the world.