Acts 5:19-20

But during the night an angel of the Lord opened the prison doors, and leading them out said, Go, stand and continue to tell the people in the temple (courtyards) the whole message of this Life (the eternal life revealed by Christ and found through Him in faith.)

The born-again believer has been let out of prison! We were once one of the lost with no hope of being free, but God sent Jesus to save our souls.  Just as the apostles were sent out to spread the message, so are we. Our lives represent the possibilities of a life set free of prison if only we believe and proclaim the message.