Why deity nature appears in purity -We hear the deities described as having bodies of light and living in an insubstantial mansion in an immaculate realm-but that is only how it appears from our point of view. The notion of being beyond corporality is an adaptation to the habitual tendency of samsaric beings(mortal who has not reach their Buddha nature), because we live in material places, in material houses and have material bodies. From the deities' point of view, there is no such concept whtasover.