The Upanishads are a collection of ancient Hindu texts that form the basis of the Vedanta school of philosophy. The texts are mystical and contemplative in nature, and discuss topics such as the nature of Brahman (the ultimate reality) and the relationship between Atman (the soul) and Brahman. The Upanishads are considered to be some of the most important Hindu scriptures, and have exerted a profound influence on both Hindu thought and practice. Read in English, unabridged.