A Brief Exposition of Romans 9
Romans 9 is a difficult passage—perhaps one of the most difficult passages in the New Testament. In this chapter, Paul uses three illustrations to explain the sovereignty of God over judgment and mercy.
- In Rom 9:10 – 14 Paul referred to Jacob and Esau. Before they were born, before either of them had done good or evil, God had already decided that Jacob (the younger) would receive his mercy, rather than his older brother.
- In verses 15 – 18 Paul goes on to the account of Pharaoh, inferring that God hardened Pharaoh’s heart so that His Name would be glorified.
- Finally, in verses 19 – 23 Paul uses clay pottery to illustrate the foolishness of a created being trying to tell its creator what it wants to be, or how it wants to be used.
We should note the context of this chapter. Paul is giving these illustrations to show the Jews that God had the right to decide to bring the Gentiles into His kingdom on an equal basis to the Jews. I don’t believe that he is saying that God decides our destiny in advance, and we have no choice in the matter. In the first two illustrations, God is basing his decisions on the choices He knew Pharaoh and Esau would make.
The third illustration clarifies that God has the right, as God, to call both Jews and Gentiles into His kingdom. He does not make this decision based on race or bloodline. Instead, He insists that God has the right, because He is God, to save some people and not save others, no matter who they are. 
This chapter clarifies that God has reserved the right to make decisions concerning mercy and judgment. He says clearly that this is His prerogative, not ours. It is hard for humans to accept that we are subject to an overarching authority in these matters, but that is the point of this chapter.
Throughout church history, people have understood the Bible in various ways. Some, like Origen, believed that hell would be empty someday. Some believed that the second death was an obliteration and that eternal torment was reserved for the devil and his angels. Many evangelicals believe in eternal torment for all sinners.
According to this chapter, I think it fair to say that God has decided this question, and we should simply submit to God’s decision. That statement is furiously disputed by some people, but I don’t see how we say anything else about it.
But indeed, O man, who are you to reply against God? Will the
thing formed say to him who formed it, “Why have you made me like
this?” (Rom 9:20 NKJV)
 This should not be understood to mean that we are predestinated to heaven or hell before we are born, and we have no choice in the matter. We must always take difficult scriptures and interpret them considering clear scripture. The NT is clear that any person can come to Christ and be saved.