How do we know Christ is eternal?

Christ's eternal nature is a central tenet of the Christian faith, explicitly stated in John 1:1 where it says, 'In the beginning was the Word.' This declaration suggests that Christ's existence did not begin at His incarnation; rather, He existed eternally alongside God the Father before the foundation of the world. Hebrews 7:3 echoes this concept by describing Him as one who is without genealogy, signifying that He has neither beginning nor end. Thus, understanding Christ as eternal shapes our comprehension of His divine authority and His role as the Creator, as expressed in John 1:3: 'All things were made through Him.'