or adyton (Greek: Άδυτον) or adytum (Latin). The Holy of Holies of any temple. A name for the secret and sacred precincts or the inner chamber, into which no profane could enter; corresponds to the sanctuary of the altars of the Christian churches.
"No one can achieve illumination without having been previously purified. Only those that have achieved purification and sanctity can enter into the hall of illumination."