Cyprian of Carthage, Three Books of Testimonies Against the Jews III.28: That even a baptized person loses the grace that he has attained, unless he keep innocency

27. That even a baptized person loses the grace that he has attained, unless he keep innocency.

In the Gospel according to John: “Lo, thou art made whole: sin no more, lest a worse thing happen unto thee.” Also in the first Epistle of Paul to the Corinthians: “Know ye not that ye are the temple of God, and the Spirit of God abideth in you? If any one violate the temple of God, him will God destroy.” Of this same thing in the Chronicles: “God is with you, while ye are with Him: if ye forsake Him, He will forsake you.”