O God of God! O Light of Light!

“O God of God! O Light of Light!” is a reverent and doctrinal hymn by John Julian, written as a poetic confession of classic Trinitarian faith. The hymn is deeply shaped by the language and theology of the Nicene Creed, especially its affirmation of Christ as true God from true God, begotten and not made. Julian’s text serves as both praise and proclamation, directing worshipers to the eternal nature and divine glory of Jesus Christ.

The opening address, “O God of God! O Light of Light!”, immediately places the hymn within the framework of orthodox Christology. This language echoes John 1:1-5, where Christ is revealed as the eternal Word through whom all things were made, and in whom is life and light. The hymn affirms that Christ is not a created being, but shares fully in the divine essence of the Father.

Light is a central image throughout the hymn, symbolizing truth, holiness, and revelation. John 8:12 declares Christ to be the light of the world, and Julian’s hymn draws on this truth to emphasize that all spiritual illumination flows from Him. The light of Christ dispels darkness, guides the faithful, and reveals the character of God.

The hymn also reflects Hebrews 1:1-3, which describes the Son as the brightness of God’s glory and the express image of His person. Julian’s language carefully avoids speculation and remains rooted in biblical and creedal confession. The focus is not on explaining the mystery of the Trinity, but on adoring it with humility and awe.

There is an eschatological dimension to the hymn as well. Revelation 21:23 speaks of the heavenly city where the glory of God gives light and the Lamb is its lamp. Julian’s text anticipates this eternal reality, pointing believers toward a future where Christ’s divine light will fully illuminate all creation.

“O God of God! O Light of Light!” is especially suited for Trinity Sunday, Christological feasts, and services that emphasize doctrinal clarity and reverent worship. Its strength lies in its faithfulness to historic Christian belief and its ability to turn doctrine into doxology. The hymn invites believers not merely to understand truth about Christ, but to worship Him as eternal God, radiant Light, and glorious Savior.