What does the Bible say about Paul’s confidence in imprisonment?

In Philippians 1:19, Paul states, 'I know that this shall turn to my salvation,' referencing his imprisonment. His confidence stems from the assurance that God is in control and will use the circumstances for the advancement of the Gospel. Paul emphasizes that his imprisonment, while difficult, is inconsequential to the ultimate purpose of God. He believes that whether he is released or suffers martyrdom, his delivery and the magnification of Christ will occur, showing that for him, both life and death serve to glorify God.