Why is God's immutability important for Christians?

For Christians, the immutability of God is foundational to their faith. It assures them that God will forever remain the same in His character, purpose, and promises. This constancy provides believers with profound comfort, especially in times of uncertainty. If God were to change, the basis of hope and trust in His salvation and covenant would be compromised. However, because He does not change, Christians can confidently rely on His assurance of eternal life, as expressed in John 10:28-29, knowing that nothing can pluck them from His hands. His unchanging nature reinforces the belief that His love and faithfulness towards His people are unwavering.