How the Law is a Blessing
We obey the commandments, therefore, not in order to merit God’s favor but because we have already experienced his favor. The Decalogue was given to Israel after God delivered them from Egypt. The law was a response to redemption not a cause of it. In one sense, the law shows us our sin and leads us to the gospel. But in another sense, law ought to follow the gospel just as the giving of the Decalogue followed salvation from Egypt. We obey God’s words not because we cower under threat of judgment, but because we stand confidently with our Deliverer and gladly accept his good rule for our life.
More by DeYoung on the Law and Sanctification, an important discussion on the subject: