If you really want to dive deep into the implications and ramifications of God’s grace and mercy to us in Christ, you really need to take the time to listen to this series of sermons on Romans 9 by John Piper. It is unfortunate these passages get skimmed over, ignored or nuanced to such a great degree there is nothing left but hollow theology. There is gold here if you will spend the time with it. Romans 9 answers these questions (though Romans 10-11 continues the answers as well):

  1. “If God has made such great promises to us in Christ that will NEVER fail (as explained in Romans 8), why is it that a majority of Israel rejected Christ, the only One who could save them?”
  2. “If all of Israel is not saved, and God’s promises have failed them, what are we to make of the promises of God given to us in Romans 8?”
  3. “Is God required to show mercy to everyone?”
  4. “Is God free to show mercy to whom He pleases?”
  5. “Is God bound by what the creature does or doesn’t do, or is He free to do as He pleases, to His own glory and for His own purposes?”
  6. “From where did our faith come from?”