Language of being a prisoner for Christ is not very common or popular here in the US. Part of it, I guess, is rooted in our colonial past and we are not comfortable with slavery language as a culture. Part of it may be rooted in our quest for freedom. Part of it might be rooted in our fear of criminals. Part of it may be rooted in our sense of the American Dream which calls into question authority which could threaten our individualism.
However, if anyone who has read the New Testament can quickly find. Being a slave is a common theme in the writings of Paul and those attributed to Paul there are multiple references to Paul as a prisoner of Christ.
Philemon 1:1, Ephesians 3:1, Ephesians 4:1, Colossians 4.10, 2 Timothy 1.8, to list a few.
Those of us who claim the Christian name takes the role of being in submission to a higher authority in our lives. Christians are prisoners of the message of Jesus Christ. Christians have freedom in Christ but that freedom in Christ is paradoxical.
We are free from guilt, shame and the law.
We are prisoners of Grace, Love and forgiveness.
Anyone who is a prisoner of Grace and Love and forgiveness realizes that their actions are limited - like a prisoner.
Christians are not free to condemn. We are not free to judge. We are not free to hate or abuse or deny people food, water or other resources.
Christians are prisoners to forgive even if you do not want to. Christians are prisoners to give grace to all people at all times even if we do not want to of feel others deserve it. Christians are prisoners to love people even if we do not want to.
Followers of Christ are free.
We are free to chose becoming a prisoner.