GEN1427 Here I want to call attention to the distinction between one who has attained purity and one who has attained holiness: For one who has attained purity, his corporeal deeds serve only his essential needs, and he himself utilizes them only out of necessity.  In this manner, they gain release from the ingredient of evil that exists within all corporeality and they remain pure.   However, they have not yet entered the domain of the holy, for if one could manage without them he would then be better off.   One who has attained holiness, however, and who cleaves to his God constantly and whose soul walks about [immersed] in thought regarding those matters that are [of a] transcendent [nature] in his love for his Creator and is fear of Him, is considered as if he were walking about before the Eternal in the “Land of the Living” [the world-to-come] while still in this world. And this kind of person is likened to the Tabernacle, the Beis HaMikdash, and the altar, and this is related to what our Sages of blessed memory commented Bereishis Rabbah 92:6: “’God’s Presence left him’ [this verse] means that the Patriarchs themselves are the Divine Chariot.”   PATH 177-8