Under the old covenant we were restrained from sin through mortal terror but in the new we are restrained by love. Look again at Paul’s warning about prostitutes (in 1 Cor. 6:15). Behind the warning—don’t do it—there is a surprising and reassuring affirmation of union. Paul is saying it is possible, though not advisable, to unite the members of Christ’s body with prostitutes. Do you see it? Earthly marriages may break and fail, but your union with Christ is unbreakable. Sin cannot break it. Addiction cannot break it. The stupidest decisions you might ever make cannot break it.
This should not be taken as a challenge to see what you can get away with but as a stunning declaration of Christ’s absolute commitment to love you and stick with you no matter what. This is what changes us—not the weak influence of the rule (there is no rule; all things are lawful) but the relentless and determined passion of his love.
The love of God is the greatest force in the universe. Sin wilts before it. When you encounter the undaunted and unending love of Christ, it changes you. You know longer want to sin. The passing pleasures of this world lose their appeal because you have found a love that is truer and better by far.
The Gospel in Ten Words, KingsPress, 2012, 59.