Which biblical text supports the concept of the unity of God?

The concept of the unity of God is most prominently supported by Deuteronomy 6:4, which declares, "Hear, O Israel: The LORD our God, the LORD is one." This verse is a central affirmation in the Jewish Shema, emphasizing that there is only one God who is indivisible. It serves as a foundational statement of monotheism, underlining the singular nature of God in contrast to polytheistic beliefs.

In the context of the other options, while they address important theological themes, they do not specifically focus on the concept of God's unity. John 3:16 speaks to God's love and the gift of eternal life through Jesus Christ, Philippians 2:10 discusses the lordship of Christ and the ultimate recognition of Jesus as Lord by all creation, and Romans 8:31 highlights the security believers have in God's presence and support. Although all these scriptures convey significant truths about God's nature and relationship with humanity, it is Deuteronomy 6:4 that distinctly articulates the specific theological principle of God's oneness.