'Mercy' in the Bible

Therefore, God's choice does not depend on a person's will or effort, but on God himself, who shows mercy.

Therefore, God has mercy on whomever he chooses, and he hardens the heart of whomever he chooses.

Can't he also reveal his glorious riches to the objects of his mercy that he has prepared ahead of time for glory

For just as you disobeyed God in the past but now have received his mercy because of their disobedience,

so they, too, have now disobeyed. As a result, they may receive mercy because of the mercy shown to you.

For God has locked all people in the prison of their own disobedience so that he may have mercy on them all.

so that the gentiles may glorify God for his mercy. As it is written, "That is why I will praise you among the gentiles; I will sing praises to your name."