The last part of the Vedas, consisting of dialogues between teachers and students clarifying the philosophical teachings of the Vedas.
The Upanishads (from the Sanskrit meaning "sitting down near") are a collection of Vedic texts which contain the earliest emergence of some of the central religious concepts of Hinduism, Buddhism and Jainism. They are also known as Vedanta ("the end of the Veda").
They are regarded as the source of Vedanta and Samkhya philosophies. The Upanishads are considered by Hindus to contain revealed truths (Sruti) concerning the nature of ultimate reality (brahman) and describing the character and form of human salvation (moksha). The Upanishads are found mostly in the concluding part of the Brahmanas and Aranyakas and have been passed down in oral tradition.