Romans 8 begins and ends with declarations of the Christian’s absolute security before God. There is no condemnation for those in Christ (Romans 8:1-2), and nothing will ever be able to separate us from His love (Romans 8:38-39).
Having been baptized into the name of Jesus Christ for the forgiveness of sins we now live in the Spirit of God. That allows us to call God Abba Father. With the help of the Spirit, we are confident that God is for us and loves us in Christ. Romans 8:12–17 describes our position in Christ as God’s children. First, though, Paul warns us that we owe nothing to our old lives in the flesh. That’s not who we are any longer. No, since we are led by God’s Spirit, we are God’s children. God has not given to us a spirit of slavery, but a spirit of adoption into His family. By God’s Spirit, we cry out to Him as our Father and He confirms in our spirit that we are His children.