In the Upanishadic tradition, the concepts of Atman and Brahman occupy central importance, forming the core of Indian metaphysical thought. These notions are explored in depth in texts that aim to uncover the ultimate reality underlying the apparent multiplicity of the world. The Upanishads, considered the culmination of Vedic wisdom, engage in an inquiry into the nature of existence, consciousness, and the self, with Atman and Brahman serving as the pivotal concepts around which this inquiry revolves. Atman, in its simplest sense, refers to the inner self or soul of an individual. It is the essential, unchanging reality within each being, distinct from the transient physical body, mind, and emotions. The Upanishads assert that the Atman is eternal, indestructible, and pure consciousness. Unlike empirical selfhood, which is contingent upon social roles, personal history, or bodily identification, Atman represents the universal and immutable essence that underlies individual existence. The Chandogya Upanishad, for instance, emphasizes the Atman as the innermost essence, stating that “Tat Tvam Asi” or “That Thou Art,” suggesting that the individual self is fundamentally identical with the ultimate reality, Brahman. This identification reveals a radical understanding of human existence: beneath the superficial distinctions of personality and physicality lies a profound unity with the cosmic principle. Brahman, on the other hand, is the ultimate, infinite, and transcendent reality that pervades all existence. It is beyond time, space, and causation, and is described as sat-chit-ananda—being, consciousness, and bliss. The Upanishads portray Brahman as the source, sustainer, and ultimate goal of the universe. Unlike deities with anthropomorphic qualities, Brahman is impersonal, boundless, and beyond description, accessible only through intuitive insight and meditative experience. The Brihadaranyaka Upanishad explores Brahman as the substratum of all phenomena, asserting that everything in the cosmos, visible and invisible, is a manifestation of this singular, undivided reality. The Upanishads suggest that Brahman is not merely an abstract principle but the very essence that animates all life and existence. It is immanent in the world, yet transcends it, and this dual aspect—immanence and transcendence—allows for the intricate philosophical discourse found in these texts. A critical aspect of Upanishadic philosophy is the interrelationship between Atman and Brahman. Rather than viewing the self and the ultimate reality as separate entities, the Upanishads assert their fundamental unity. The declaration “Tat Tvam Asi” exemplifies this insight, pointing to the non-dualistic realization that the innermost self is identical with the