How do we know that sovereign grace is essential for salvation?

Sovereign grace is the cornerstone of Reformed theology, underscoring that salvation is entirely the work of God rather than human effort. Ephesians 2:8-9 states, 'For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.' This passage illustrates that grace is unearned and freely given. Without God's sovereign choice to save, no one could be saved due to our total depravity and inability to seek Him. This truth highlights the necessity of grace in the salvation of sinners.