How do we know God has a purpose in election?

God's purpose in election is affirmed in Romans 9:10-16, where it states that God's choice is not based on human actions or merits but solely on His sovereign will. Before the twins Jacob and Esau were born, and before they had done anything good or bad, God declared, 'the elder shall serve the younger.' This underscores that God’s choice is anchored in His immutable will and loving purpose. Additionally, the narrative of Isaac and Rebekah showcases how God's sovereign will unfolds, revealing that His plans cannot be thwarted by human decisions.