How do we know the doctrine of irresistible grace is true?

The doctrine of irresistible grace asserts that when God intends to save a person, His grace effectively draws that individual to Himself, overcoming all resistance. This doctrine is rooted in passages such as John 6:37, where Jesus states that all whom the Father gives to Him will come to Him. Additionally, Romans 8:30 affirms that those whom God predestines, He calls, and those He calls, He justifies. In every instance, the efficacy of God's grace in the calling of His elect highlights that the initiative in salvation rests solely with God. This sovereignty reassures believers that their salvation is secure and rooted in God's perfect plan.