Read Romans 11:15 Using Other Translations
For if the casting away of them be the reconciling of the world, what shall the receiving of them be, but life from the dead?
For if their rejection means the reconciliation of the world, what will their acceptance mean but life from the dead?
For since their rejection meant that God offered salvation to the rest of the world, their acceptance will be even more wonderful. It will be life for those who were dead!