God's law (i.e., the laws of God that came through Moses) is holy, righteous, and good. But it cannot save us because of one formidable problem: sin. Left on our own, and apart from the power of the Holy Spirit, sin will always defeat us. We cannot obey God's law. Thus, we will always be under God's wrath because, as Paul says, the wages of sin is death. The only solution is the gift of God through the Gospel, which is eternal life through faith in Christ Jesus.