How do we know that God's grace is irresistible?

The concept of irresistible grace, a key tenet of Reformed theology, refers to the work of God in the hearts of His chosen people, ensuring they respond to the gospel. In Galatians 1:15, Paul recounts how God called him by His grace, illustrating that when God purposes to draw someone to Himself, that calling is effectual and cannot be resisted. Scripture teaches that while individuals may initially refuse or resist God's call, the power of His grace ultimately prevails, transforming their hearts. This grace isn’t coercive but rather enables the individual to embrace their need for Christ fully. The beautiful promise is that all whom God has purposed to save will come to Him, learning that His grace not only calls but empowers them to believe.