How do we know God's promises will always be fulfilled?

Hebrews 6:18 emphasizes that it is impossible for God to lie, which means His promises are as certain as His character. The unchanging nature of God reflects His reliability; when He declares that He will act, He does so without fail. For example, His covenants made with figures like Abraham and David are everlasting. This is not only comforting but essential for our faith. Knowing that God does not change means that the promises of salvation and redemption through Christ are secure and unbreakable, providing believers with hope and confidence for the future.