One of the misconceptions of the Christian life is that everything will be all right after one embraces the Christian faith and gets baptized. But in reality, we live in a world still under the influence of the powers of Sin and death. So, it is necessary to recommit ourselves, on a daily basis, and to say "Yes" to God's Spirit. Life in the Spirit of God is not automatic; it requires active participation by believers who must set their minds and hearts on the Spirit and actively oppose the flesh. So, in reality, some who are baptized do not make their death to sin a reality. In other words, life in the Spirit is conditionally dependent upon our ongoing participation.
St. Paul, in his letter to the Romans, takes up the mantle of Moses, who set before the Israelites the choice between life and death. Paul insists that we are no longer debtors to fleshly influence. As we have been rescued from that sphere, Paul urges us not to return to it, as to do so is death. This conviction leads Paul to use the metaphor of adoption. The Roman custom of adoption made the adopted children full heirs of the adoptive father’s estate. So, as God’s children, we are co-heirs with Christ the son, which means that we will share in the inheritance of resurrection and life and his Glory. But Paul attaches responsibility, even though we are co-heirs of God's Glory, the future Glory requires co-suffering with Christ. Thus, we have to participate fully in the suffering of Christ before experiencing his Glory.