We must cleanse ourselves before beginning our Holy Service to G-d

Service #1: Outer-altar, outer-heart, sacrifices, rectifying our inner-animal, demands continuous self-cleansing, before every service, less we fall.

Service #2: Inner-altar, Inner-heart, incense, bonding with G-d, demands but one washing, prior to entering, being that we are in our inner-realm of holiness.

Service #3: Inner-altar, Inner-heart, unique sacrifices, atonement for a negative experience, demands its own washing, so that we can transform the descent into an unprecedented ascent