One way to see this is to read St. Paul's words about a particular sinner and how he would treat him:
5 παραδοῦναι τὸν τοιοῦτον τῷ σατανᾷ εἰς ὄλεθρον τῆς σαρκός, ἵνα τὸ πνεῦμα σωθῇ ἐν τῇ ἡμέρα τοῦ κυρίου.
or in the Vulgate:
tradere huiusmodi Satanae in interitum carnis ut spiritus salvus sit in die Domini Iesu
or from the Rheims NT:
To deliver such a one to Satan for the destruction of the flesh, that the spirit may be saved in the day of our Lord Jesus Christ. [1 Corinthians 5:5]

Whatever else the contemporary misunderstanding of the aphorism indicates, the saying itself certainly isn't out of harmony with St. Paul.

The same could be said for Our Lady of Fatima's insistence that not only prayers but SACRIFICES be made for the conversion of sinners. The only time she smiled during the apparitions was when she told the children: "God is pleased with your sacrifices."

Here's a great way of seeing it as the Servant of God, Fr. John Hardon teaches:
www.therealpresence.org/…/Abortion_Euthan…