You who feel justified by the law must live all the law. You who pick and choose parts of faith, act as your own gods. Let God be God. Live in the freedom He gave us in Grace, not freedom in the flesh.
David delighted in the Law, for he knew how lost we were before God gave the Law as a guide. But Jesus completes the Law and offers us freedom from the slavery of legalism and freedom from sin. This relationship is superior. Why go back to slavery?