“Impurity is also twofold: physical and mental. By mental are impure thoughts, impure looks, rancor, deceit and the like, and the bodily filth are: adultery, fornication…. He wants us to be clean and from that and from other impurities. Come out from among unbelievers, and separate yourselves, that is, live separately, and be clean, and then I will take you.”
(St. Theophylact of Ohrid, Commentary on 1 Corinthians) [Sanctification; Separation]

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