If the Son sets you free, you shall be free indeed

The essence of the argument is not to substitute Savior for Son. The Savior sets us free from sin and death. But it is the Son to allows our mortal self to be free. This is not by way of discipline. It is up to us to take every thought captive to our Lord Jesus Christ. Where individuality lives, submission to Christ is missing. We must give up our right to our self so that our spirit is free to serve God.