Brahman is a key concept in Hinduism, referring to the highest universal principle and the ultimate reality in the universe. It is the spiritual core of the universe of finiteness and change, and is eternal, conscious, irreducible, infinite, omnipresent, and the source, goal, and purpose of all spiritual knowledge. Some key points about Brahman include:

• Cosmic Power: Brahman refers to the supreme cosmic power and ontological ground of being.

• Impersonal: Brahman is an impersonal concept, and is referred to as the supreme self.

• Ineffable: Brahman is said to be ineffable and higher than any description of God in personal form.

• Sum Total: Brahman is considered to be the sum total of all that ever is, was, or ever will be, including the human soul, or atman.

• Expansion: The concept of Brahman touches upon the expansion of breath in the chest, which was seen as analogous to the spiritual extension of the individual performing the prayer from human to cosmic proportions.

Brahman is discussed extensively in the Vedas and the early Upanishads, and is conceptualized as the creative principle which lies realized in the whole world. Brahman is also a metaphysical concept of Hinduism, referring to the underlying life-force which is the subtle essence of everything.