How do we know salvation is intended for some and not all?

Salvation is a complex work of God's grace, which is based on His sovereign choice rather than human merit. Romans 9:11-13 clearly illustrates this principle through the example of Jacob and Esau, where God chose Jacob before he was born, highlighting the concept of election. Additionally, the idea that God's purpose and mercy are selective is reinforced throughout scripture, demonstrating that if God had not chosen to save some, none would be saved. Thus, this doctrine of election underscores the grace of God in salvation, as it is not based on our actions but solely on His divine purpose.