How do we know Christ is our everlasting light?

Christ is described as the everlasting light because, as stated in John 1:4, 'In Him was life, and the life was the light of men.' This reveals that His life is the only source of light capable of dispelling our darkness. Isaiah 60 emphasizes that the Lord will be our everlasting light, indicating His authority and the permanence of His presence in the lives of believers. By exposing our sinful state and offering salvation, He assures us that we will never be left in darkness. This reflection of Christ as our light illustrates the grace offered to those who are His elect.