Are You a Bond Servant of Christ?

Luther gets this from paul, who says, even if you are a slave, you are free. Anda, you you are subject to no one. You are freeman in christ. However, being in christ means that you are a bond servant of christ. That you are bought by christ, that you belong to christ, therefore, you are a servant of all. So you are owned by no one, but a servant of every one.