Eternal Security: Are we kept by God's power ony as long as we choose to stay (with reference to the prodigal son and the scripture about His losing none)? [John 17:12-20, I Peter 1:5, Romans 5:2, Ephesians 2:8-9]. Prodigal Son: Was the Prodigal Son always "a son" even when he was away from his father? [Acts 17:28-29, Luke 15:11-32].