Levítico 21:18 Cabalá: Sha'arei Kedusha

It is necessary for a person to eradicate all impure and vile thoughts and impurities from each of these limbs and organs. For, they stem from the extraneous husks (Kelipot) which dwell in man. He therefore must repair and prepare the place, to refine and cleanse it, thus making it is a fitting receptacle within which the flame of HaShem-יהו״ה can dwell. For, when any limb or organ becomes blemished through the iniquities and transgressions that a person does, the Holy One blessed is He does not dwell in that limb. This is as stated,³²⁹Leviticus 21:18 “For any man in whom there is a blemish shall not approach.” Any person who causes blemish to a particular commandment, it is as if he has transgressed against the form and body of the King. A person must therefore burn those external husks (Kelipot) that dwell there in each of those limbs, and must eradicate them from within him. For, those extraneous husks are called sourdough (Se’or), leaven (Chametz), chaff (Motz), and straw (Teven), and he must eradicate them from those flames about which it states,³³⁰Proverbs 6:23 “The commandment (mitzvah) is a flame (Ner-נר),” and,³³¹Proverbs 20:27 “The soul of man is the flame of HaShem-נר יהו״ה, Who searches all the chambers of one’s innards.” By doing so, the Holy One, blessed is He, dwells there, meaning, the Name HaShem-יהו״ה, blessed is He, and His titles, which are called His limbs, along with His myriads of camps and troops, which are the angels that are tied to that particular limb, and which guard that particular limb from all evil forces and extraneous husks of Kelipah that were residing there.