Since disobedience to God's Word (Sin) in a continuous manner makes grace more abundant, man came up with this idea: Why not continue in disobedience (Sin)? This is the thinking of so many believers in today's society. Even if they don't say it, their actions show it. This is certainly a possible conclusion, though a wrong one, from the teaching of grace in chapter 5. Apparently ambassador Paul had been accused of teaching this false doctrine, called antinomianism (that faith alone, not obedience to the moral law is necessary for salvation) To silence his accusers, Paul shows in chapter 6 that a believer who continues in his or her disobedience (sin) in God's Word would be denying his or her own identity in the Kingdom of God. The ambassador of the Kingdom made it very plain.
For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.
Romans 5:20-21 Romans 6:23