How do we know the doctrine of divine calling is true?

The doctrine of divine calling is substantiated through the biblical narrative of Moses in Exodus 4, where God personally calls and equips him for the monumental task of leading the Israelites out of Egypt. God addresses Moses' objections directly, demonstrating His authority and commitment. The signs that God provided as proof of His calling emphasize that He does not call individuals without purpose and that His plans will prevail. This establishes a firm basis for believing that God actively calls and prepares His servants according to His sovereign will, enabling them to fulfill their roles.