God is sovereign, and so He does what He wants, for His own purpose.
Paul uses his turbulent past to show Timothy how Jesus can change even the worst of people.
Paul encouraged Timothy's assignment at the church of Ephesus, that Jesus put him there.
Salvation is secure in Jesus, who has the authority, and the right to save or condemn.
Read about God's ultimate plan for mankind, an our earth as we know it.
Paul left Timothy in Ephesus to lead the church and keep false teachers out from the church.