Which principle belief of Judaism emphasizes the Oneness of God as noted in Deuteronomy 6:4?

The principle belief of Judaism that emphasizes the Oneness of God is rooted in Deuteronomy 6:4, which states, "Hear, O Israel: The Lord our God, the Lord is one." This verse is a fundamental declaration of monotheism in Judaism and articulates the belief that there is only one true God who is singular, unique, and indivisible. This concept not only establishes the foundational monotheistic perspective of Judaism but also reinforces the relationship between God and the Jewish people, underscoring the significance of worshipping one God without any divisions or alternatives.

In contrast, the other options, while important aspects of Jewish belief and practice, do not specifically address the theme of the Oneness of God. The concept of the Covenant refers to the special agreement between God and the Jewish people, detailing responsibilities and promises, while Moral Law pertains to ethical guidelines and commandments that govern behavior but do not directly illuminate the singularity of God. Spiritual Essence relates to the nature of God and the human soul but does not encapsulate the specific declaration found in the Shema regarding God's oneness. Thus, the emphasis on the Oneness of God directly aligns with the core tenet expressed in the scriptural reference from Deuteronomy.