Why is it important that God cannot lie?

The fact that God cannot lie is crucial for our faith and assurance as believers. In Hebrews 6:18, it says, 'It is impossible for God to lie,' which underlines the reliability of His covenants and promises. If God could lie, we would have no firm foundation upon which to base our faith. His truthfulness assures us that what He promises in His Word will come to pass. This characteristic also amplifies our hope in salvation, as we trust in the reality of His promises that He has made to His people throughout scripture.