Only one is known to have been released. More than 2.5 million Sudanese Christians have been killed and 4 million made refugees. It produces growth. Suffering produces perseverance. Perseverance here is making the most of the situation, rather than just putting up with it in a resigned way.
Perseverance produces character.
The word for character is talking about someone of value, who has been tested and shown to be so. This in turn leads to hope, but more of that later. So peace with God results in hostility from the world and results in growth. We should see our sufferings as opportunities to keep going in our faith. For it to be refined in the light of the knowledge of God through Jesus by the Holy Spirit.