Tullian Tchividjian writes:
"In Romans 6:1-4 the Apostle Paul answers antinomianism (lawlessness) not with law but with more gospel! I imagine it would have been tempting for Paul (as it often is with us when dealing with licentious people) to put the brakes on grace and give the law in this passage, but instead he gives more grace—grace upon grace.
Paul knows that licentious people aren’t those who believe the gospel of God’s free grace too much, but too little...
The only way licentious people start to obey is when they get a taste of God’s radical, unconditional acceptance of sinners. It was the kindness of the Lord that led you to repentance (Romans 2:4). What makes you think that same kindness which flows supremely from the gospel of free grace won’t lead others to repentance?
Here’s a great scene from Les Miserables illustrating how powerful the radical [nature] of grace is in melting hard, undeserving, law-breaking hearts."