Moses writes about the righteousness which is of the law, “The man who does those things shall live by them.” But the righteousness of faith speaks in this way, “Do not say in your heart, ‘Who will ascend into heaven?’ ” (that is, to bring Christ down from above) or, “ ‘Who will descend into the abyss?’ ” (that is, to bring Christ up from the dead). But what does it say? “The word is near you, in your mouth and in your heart” (that is, the word of faith which we preach)… (Romans 10.5-8)
The end and goal of the law is a righteous standing before God by faith. Christ is that end and goal. Moses wrote about the righteousness which is of the Law in Leviticus 18.5. You just have to do the Law and live by the Law in order to have the righteousness of God. The problem is that no one does. But the Law had another component:
“For this commandment which I command you today is not too mysterious for you, nor is it far off. It is not in heaven, that you should say, ‘Who will ascend into heaven for us and bring it to us, that we may hear it and do it?’ Nor is it beyond the sea, that you should say, ‘Who will go over the sea for us and bring it to us, that we may hear it and do it?’ But the word is very near you, in your mouth and in your heart, that you may do it.” (Deuteronomy 30.11-14)
Moses emphasizes the heart in this passage. Loving obedience comes from a trusting heart. Pleasing God is not beyond Israel’s reach according to Moses. God required faith. Israel cannot think that they can ascend into heaven and bring Christ down to earth to save His people. Israel cannot think that they are good enough to raise up Christ the Messiah from the dead. God had already done these things. They just needed to accept them in their heart. The word is near you, in your mouth and in your heart.