Is God unjust for choosing some and not others?

The question of God’s justice in election arises prominently in Romans 9. Paul asserts that God is not unjust for choosing Jacob over Esau, as His sovereign will is the foundation of salvation. This doesn't stem from any human actions but from God's determination before birth. God declares in verse 15 that He will have mercy on whom He will have mercy, illustrating that divine grace is not obligated to human merit. Thus, God’s sovereign election affirms His sovereignty, ensuring that He remains just while dispensing grace according to His purpose.