Aitreya-Aranyaka Upanishad

The Aitreya-Aranyaka Upanishad, estimated to date from the 6th or 5th century BCE, is a significant text within the Upanishadic literature, which is foundational to Vedanta philosophy. It consists of three sections, with the first being liturgical and detailing the Mahavrata ritual, while the latter two sections include the Mahaitareya Upanishad. The Upanishads, including this one, are philosophical treatises that explore profound concepts without being tied to any specific religious doctrine. They have influenced thinkers like Arthur Schopenhauer, who regarded them as expressions of the highest human wisdom.