Why is God's attribute of immortality important for Christians?

In the sermon, the preacher emphasizes that God is the 'only one who has immortality' (1 Timothy 6:16). This attribute is not merely about living forever; it signifies that God exists outside of time and is unchanging in His nature and purposes. For Christians, this truth provides profound assurance that our faith is in a God who does not wane or fade away as time progresses. His immutability and eternal existence give believers confidence in the promises He has made, including the promise of eternal life through Jesus Christ. Knowing that God is immortal allows Christians to endure life's trials with hope, resting assured that their salvation is secure in an unchanging God.