Mortification in Christian theology to the subjective experience of Sanctification, the objective work of God between justification and glorification. It means the 'putting to death' of sin in a believer's life. (Colossians 3:5) Reformed theologian J.I. Packer describes it in the following way: "The Christian is committed to a lifelong fight against the world, the flesh and the devil. Mortification is his assault on the second."[1] Christians believe that this internal work against sin is empowered by the Holy Spirit and so therefore is also part of regeneration.