Soon after Augustine's conversion, he was walking down the street and passed by a prostitute whom he had known most intimately. She called but he would not answer. He kept right on walking.
"Augustine," she called again. "It is I!"
Without missing a beat and with the assurance of Christ in his heart, he replied, "Yes, but it is no longer I."
Because of Christ and His Spirit, Augustine was a changed man. He was born again, a brand new creation. (Adrian Dieleman, "Receive the Holy Spirit")