How do we know that God's promises are unchangeable?

The Bible underscores the unchangeability of God's promises through His immutable character. Romans 9:6 states that God's word has not failed, indicating that His promises to His people are steadfast and sure, independent of human actions. Furthermore, in Hebrews 6:17-18, the author reveals that God, desiring to show the unchangeableness of His purpose, confirmed it with an oath. This emphasizes the assurance that His covenant and promises will always come to pass as He has decreed. Therefore, believers can trust in the reliability of God's word, knowing that His promises are bound by His eternal nature and sovereignty.