From a 2005 sermon by the inimitable John Piper:

“In all of its negative effects this is where the law was leading — to Christ. The law was not leading from self-dependent law-keeping to God-dependendent law-keeping as the way to life. No, no. The problem is far greater than that. We don’t just need a new motive. We need a Savior. The law was leading from all law-keeping (self-dependent or God-dependent) to Christ as the way of life.”

And again:

“Do you say, ‘Now I am forgiven by faith alone, and now I have the imputed righteousness of Christ by faith alone, and now I have the Holy Spirit within me by faith alone, so now I will go back ot the law – the ten commandments, and whatever other commandments there are (Romans 13:9) — and I will focus my new God-given ability on these commandments and fulfill them’?

No, I don’t think that is the way Paul guides us. I think he wants to speak rather like this: ‘Now I am forgiven by faith alone, and now I have the imputed righteousness of Christ by faith alone, and  now I have the Holy Spirit within my by faith alone, so now I will continue to make my focus Jesus Christ every day, and I will look to him for everything my soul craves. And from my union with Christ, nurtured hour by hour by focusing on Christ as my great Savior and mighty Lord and infinite Treasure, I will love people. Christ will be my focus, love will be my fruit.'”

Read it all here.