What does the Bible say about true faith in God?

The Bible explains that true faith is trusting in the character and promises of God, as demonstrated through the patriarchs in Hebrews 11. These individuals believed in the promises of God even when they could not see the physical fulfillment in their lifetimes. For instance, Sarah's faith was not based on her strength but on her judgment of God's faithfulness. This kind of faith is a gift from God, rooted in His unchanging nature and ability to fulfill His promises, unlike the unreliable promises of men.