God’s law is not opposed to grace, nor is it an enemy of grace. Neither is the law of God opposed to us as we seek to live by grace. To live by grace means we understand that God’s blessing on our lives is not conditioned by our obedience or disobedience but by the perfect obedience of Christ. It means that out of a grateful response to the grace of God, we seek to understand His will and obey Him, not to be blessed, but because we have been blessed.
Jerry Bridges, Transforming Grace, p.119