"Be confident of this very thing, that He who has begun a good work in you will compete it until the day of Jesus Christ." (v.6)
While in prison Paul was not thinking of himself or his situation, but of the bond of Christ’s love that had brought he and the church of Philippi together (v.5). So much so that he encouraged his fellowship that the LORD will perform His perfect work in their lives. That He will continue to work in them until the day of Jesus Christ (vv.6-10), which included Paul himself. Therefore, he was right where God wanted him to be, and that all things (which were happening to him), were for the furtherance of the gospel (vv.12-14).
The same can be said for us. While we are not in chains, God is in control of our lives. Whether calm seas or rough water, comfort or uneasiness, joy or sorrow, He is working in us until the day of Jesus Christ, “both to will and to do His good pleasure” (Phil. 2:13). So hang on guys, enjoy the ride, and lean on Him every day.
The Truth: "And we know that all things work together for good to those who love God, to those who are the called according to His purpose." (Romans 8:28)