St . Gregory of Nyssa , on his Sermon on the Dead (383 A .D ) said that after the death of a person , knowledge between vice and virtue are well delineated , of which he /she may share the divine essence only upon exposure to the purifying fire . The implication : in for the soul to gain eternal life , he must be removed from the effects of sin , possible only through the process of purification . St . Cyril of Jerusalem in his Catechetical Lectures in...











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