How do we know God's chosen ones will not be cast away?

The promise of God not casting away His chosen ones is foundational in Reformed theology, illustrated in passages like Isaiah 41:9. Here, God expresses His unwavering commitment, stating 'I have chosen thee, and not cast thee away.' This reflects God's grace, not based on any merit but on His sovereign love and choice. The Reformed perspective underscores that God's elect will ultimately persevere because their standing is securely anchored in His righteousness, rather than their failures.