12 After this we say, “Hallowed be Your name;”not that we wish for God that He may be hallowed by our prayers, but that we beseech of Him that His name may be hallowed in us. But by whom is God sanctified, since He Himself sanctifies? Well, because He says, “Be holy, even as I am holy,” we ask and entreat, that we who were sanctified in baptism may continue in that which we have begun to be. And this we daily pray for; for we have need of daily sanctification, that we who daily fall away may wash out our sins by continual sanctification.
And what the sanctification is which is conferred upon us by the condescension of God, the apostle declares, when he says, “neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, nor thieves, nor deceivers, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God. And such indeed were you; but you are washed; but you are justified; but you are sanctified in the name of our Lord Jesus Christ, and by the Spirit of our God.” He says that we are sanctified in the name of our Lord Jesus Christ, and by the Spirit of our God.
We pray that this sanctification may abide in us and because our Lord and Judge warns the man that was healed and quickened by Him, to sin no more lest a worse thing happen unto him, we make this supplication in our constant prayers, we ask this day and night, that the sanctification and quickening which is received from the grace of God may be preserved by His protection.
Source: The Treatises of Cyprian (New Advent)