Righteousness, Preaching and Faith

In Romans 9 Paul has just laid out the history of God's purposes with Israel.
He has shown that Israel has failed to reach a law that would lead to righteousness.
NOT because the law was deficient,
but because they did not pursue the law by faith.
If Israel had pursued the law by faith,
then they would have reached the law that led to righteousness,
because they would have reached Christ.
And Christ is the end of the law (the goal of the law) for righteousness
to everyone who believes.
Paul starts by contrasting two sorts of righteousness: the righteousness of the law and the righteousness of faith.