“O how I love Your law!” (Psalm 119:97).
Federal Visionists love verses like this because they think that David is actually expressing love for the law. However, this is simply neo-legalism.
The Reformed faith has always insisted that the law is repugnant to man, as Paul states, “For by the law is the knowledge of sin” (Romans 3:20). Since the law only brings the knowledge of sin, it is impossible for anyone to say anything positive about the law, particularly that they “love” the law.
The one exception is, of course, Jesus, who was sinless. So, the law did not bring the knowledge of sin to him. Thus, when David says that he loves the law, he must be speaking from the perspective of Jesus. Jesus loves the law. Christians do not. Anyone who says they love the law is not Reformed.