All evangelical Christians agree that the Law, in particular the Ten Commandments, cannot justify us before God. The Law shows us we are sinners, and we must go to Christ for cleansing. But once we have become Christians, does the Law still have a role to play in the work of spiritual sanctification? Some say yes, some strongly no! In this article, the author argues for the verse that convinced him to the yes side. But then what to do about the Sabbath commandment? Is 9 out of 10 OK with God? A fresh look at an old thorny problem.