To be completely free requires that you are at peace in your mind, body and spirit. It is not making reference to a physical state. You can be imprisoned physically but mentally and spiritually you are fee.
Christ gave us the opportunity to have spiritual and mental freedom. To know that he is with us always and there is a purpose for our lives. Jesus shed his blood on the cross for the forgiveness of all our sins and that our spiritual freedom in him guarantees that we can live in eternal peace.
Confess your sins to the Lord today and trust in him with confidence.