The Brahma Sūtras (Sanskrit: ब्रह्मसूत्राणि), also known as the Vedanta Sūtra (Sanskrit: वेदान्त सूत्र), or as Shariraka Sūtra, and Bhikshu-sūtra (latter two in monastic traditions), are a Sanskrit text which criticizes the metaphysical dualism of the influential Samkhya philosophy, and instead synthesizes and harmonizes divergent Upanishadic ideas and practices about the essence of existence, postulating Brahman as the only origin and essence of everything. It is attributed to the sages Bādarāyaṇa, who is also called Vyāsa (arranger), but probably an accumulation of incremental additions and changes by various authors to an earlier work, completed in its surviving form in approx. 400–450 CE. The oldest version may be composed between 500 BCE and 200 BCE, with 200 BCE being the most likely date.
The Brahma Sūtras consist of 555 aphoristic verses (sutras) in four chapters, dealing with attaining knowledge of Brahman. Rejecting the smriti as a base of knowledge, it declares that the Vedic Upanishads are the only acceptable source of truth, infallible revelations describing the same metaphysical Reality, Brahman, which cannot be different for different people. The text attempts to synthesize and harmonize diverse and sometimes apparently conflicting vidyas ("knowledges") of, and upasanas (meditation, worship) of the essence of existence, stating they are actually synonyms for Brahman. It does so from a bhedabheda-perspective, arguing, as John Koller states: "that Brahman and Atman are, in some respects, different, but, at the deepest level, non-different (advaita), being identical."
