How do we know that irresistible grace is true?

The doctrine of irresistible grace assures believers that when God extends His grace to an individual, that person will inevitably respond to His call. John 6:37 reveals this truth when Jesus indicates that everyone the Father gives Him will come to Him, affirming that God's elected ones cannot ultimately resist His will. This aligns with Romans 8:30, which states that those whom He predestined, He also called, justified, and glorified. The assurance of irresistible grace provides comfort to believers, knowing that God's divine plan will come to fruition without fail.