Romans 8:18

In the first seven chapters of Romans, Paul told us that though the law is holy, and the commandment holy, and just, and good, the law only contains death for the sinner.

The law was never meant to bring life, joy nor peace. Nor was the law ever meant to produce justification nor sanctification. Rather, its purpose was and is to produce conviction, irritation of the conscience and enough conflict to bring the sinner to the hopeless end of himself, and to Christ.

The law certainly is not sin; rather, it reveals sin both to the unsaved and the saved.