The answer is: Holy One of Israel

Isa 7:14 - Immanuel; John 8:12 - Light of the World; Isa 9:6 - Prince of Peace. The Holy One of Israel was only ever used of God.

It's fascinating to peel back the layers of biblical language and discover the significance of the titles attributed to Jesus. While "Holy One of Israel" rings in the hearts of many as a glorious title, it directly refers to God in the broader context of Scripture. This particular title resonates through both the Old and New Testament, emphasizing divine sovereignty and holiness, distinct from the various roles interpreted under Jesus's name.

Also, consider that each of Jesus's titles captures a specific character trait or mission. When Isaiah referred to Emmanuel as "God with us" (Isaiah 7:14), it encapsulates beautifully the heart of his earthly purpose—showcasing how divine presence intertwines with humanity like never before.

Then, take the title "Light of the World" from the book of John (8:12). This metaphor is rich, hinting at illumination not just for physical existence but shedding light on moral and spiritual paths, an important reminder for believers even today.

And don’t overlook that “Prince of Peace,” found in Isaiah 9:6! It hints at a messianic ruler bringing deep universal peace—an awe-inspiring ideal that surges through even the tumultuous times we navigate now.

Exploring the layered meanings of these titles in the context of the Old and New Testaments transforms our understanding of both Jesus and God’s multifaceted nature!