Faith means that you accept the promises of God. That is like opening a curtain: you see a new future. Think of Abraham who believed the promises of God and saw a whole new world before him (Hebrews 11:8–10). That faith is also the foundation of hope; it stands underneath the hope. To translate the word “assurance” more literally: it means “undercarriage.” So, it carries hope; it stimulates hope and in that way it gives power to endure when you do not see the fulfillment of the promise yet. Think of Abraham in Canaan. He was a stranger. But because his faith “stood underneath” his hope, he endured, convinced that God would fulfill his promises.