And none of this has anything to do with the price of tea in China. What did Paul say to those who were taking on an attitude that since all is forgiven, no worries over future sins?
He pretty much said one who lives for God gives up sin.
Those who flippantly go on sinning with an attitude, of God will forgive seventy-seven times, may recall Jesus saying, "I never knew you." Living for God, to God, means giving up sin, turning away from it in its entirety. And that can be a life-long endeavor. When people live in Christ and he lives in them, sin is not possible because Christ is sinless. It's when someone steps outside of Christ, his way, and his life, that we can once again fall to sin.