How does God show Himself to be eternal in Scripture?

The eternality of God is a central tenet of the Christian faith, signifying that God exists outside of time and is unchanging. Revelation 1:8 reveals God as the 'Alpha and Omega,' highlighting that He encompasses all time—past, present, and future. This eternal nature provides believers with the assurance that God's character and His promises remain steady, regardless of human circumstances. As recorded in Psalm 90:2, God is from everlasting to everlasting, underscoring His immutable presence at all times, thus offering believers a firm foundation in their faith.