John Chrysostom
We are God's creation, but through sin we became servants of the devil. Then the Savior redeems us, who had given ourselves to the devil, by His Blood. That is, "you were bought with a price" (1 Cor 7:23). We were redeemed by precious Blood. Consider an honorable and good master of a household. He does not judge an unworthy servant, who has committed many offenses, worthy of his good house and common life. He hands him over to another, so that he may teach him. Then, when he sees him punished by a harsh master and saying, "I will go to my former master, for then it was better for me than now," he restores him to honor. He buys him back, so that he may become a special, περιούσιος, people, λαός. So also God restores us. How, then, are we His possession and not His possession?
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As creatures, we are His possession. But as those made alien through sin, we are not His possession. Do not think that you are God's possession if you become a sinner. Then the devil acquires you. You are his property. The man of sin, the son of perdition, buys you not with precious blood, but with dishonorable blood. He buys you with sin. He buys you with adultery, since he is not pure. He buys you with murder, since he is a murderer: "a murderer from the beginning, and does not stand in the truth" (Jn 8:44). This is his custom.