Romans 6 deals with the believer being dead to Sin.
Romans 7 deals with the believer being dead to the Law.
Romans 8 deals with the believer being alive in the Spirit, who gives us the power to life the "victorious Christian life"!
Romans 6 tells us how Sin no longer reigns over us.
Romans 7 explains how the Law no longer reigns over us.
Romans 8 explains how the indwelling Spirit gives us life and liberty in Christ Jesus our Liberator! Holy Spirit, reign in us and rain on us!!!