God calls his people to do extraordinary things. Build arks and altars. Defy kings and walk through deep waters. Critical to every call is an act of trust. We trust God because he keeps his promises. The call to trust and assurance of God's trustworthiness encouraged the Hebrews. It defined all those mentioned in the Hall of Faith (Hebrews 11). Today, it will encourage us as we look at 4 examples.