Biblical Reference:
The phrase "A Light for Revelation to the Gentiles" is found in the New Testament, specifically in the Gospel of Luke. It is part of the Song of Simeon, also known as the Nunc Dimittis, which is recorded in Luke 2:29-32. The Berean Standard Bible renders this passage as follows:

"Now, Lord, You let Your servant depart in peace, according to Your word. For my eyes have seen Your salvation, which You have prepared in the sight of all people, a light for revelation to the Gentiles, and for glory to Your people Israel."

Context and Significance:
This phrase is uttered by Simeon, a devout and righteous man in Jerusalem, who had been promised by the Holy Spirit that he would not die before he had seen the Messiah. When Mary and Joseph brought the infant Jesus to the temple to perform the customary rites, Simeon recognized Jesus as the fulfillment of God's promise. His proclamation highlights the universal scope of Jesus' mission.

Theological Implications:
1. Universal Salvation: The phrase underscores the inclusivity of the Gospel message. Jesus is not only the Messiah for the Jewish people but also a revelation to the Gentiles. This anticipates the later expansion of the Christian mission beyond Jewish boundaries, as seen in the Acts of the Apostles and the Pauline epistles.

2. Fulfillment of Prophecy: Simeon's declaration echoes Old Testament prophecies concerning the Messiah's role as a light to the nations. Isaiah 42:6 and 49:6, for instance, speak of the Servant of the Lord being a light to the Gentiles, indicating that Jesus' coming fulfills these prophetic expectations.

3. Revelation and Glory: The dual focus on revelation to the Gentiles and glory to Israel suggests a twofold purpose in Jesus' mission. For the Gentiles, Jesus is a revelation, unveiling the truth of God's salvation plan. For Israel, He is the glory, fulfilling the promises made to the patriarchs and the nation.

Historical and Cultural Context:
In the first-century Jewish context, the idea of the Messiah being a light to the Gentiles was revolutionary. Jewish expectations of the Messiah were often nationalistic, focusing on the restoration of Israel. Simeon's prophecy, therefore, presents a broader vision of the Messiah's role, aligning with the inclusive nature of God's covenantal promises.

New Testament Development:
The theme of Jesus as a light to the Gentiles is further developed in the New Testament. The Apostle Paul, in particular, emphasizes this aspect of Jesus' mission in his letters. In Acts 13:47, Paul and Barnabas quote Isaiah, applying the prophecy to their own mission to the Gentiles: "For this is what the Lord has commanded us: 'I have made you a light for the Gentiles, to bring salvation to the ends of the earth.'"

Conclusion:
The phrase "A Light for Revelation to the Gentiles" encapsulates the universal reach of Jesus' mission and the fulfillment of God's redemptive plan for all humanity. It serves as a pivotal moment in the Gospel narrative, foreshadowing the global spread of Christianity and the breaking down of ethnic and cultural barriers in the early church.