Aitareya Upanishad — The Aitareya Upanishad — three meditations on creation, incarnation, and the identity of all consciousness with Brahman, culminating in the great saying: prajñānam brahma.
Bṛhadāraṇyaka Upanishad — The longest principal Upanishad — Yājñavalkya's realization dialogues, the Maitreyi teaching, the Honey Doctrine, and the deepest philosophical inquiry in the Vedic tradition.
Īśa Upanishad — Īśa Upanishad — the opening meditation of the Vedantic canon. Eighteen verses on the Lord who envelops all things, the non-dual Self, and the paradox of knowledge and ignorance.
Katha Upanishad — Katha Upanishad — the dialogue of Naciketas with Yama, Lord of Death, on the nature of the Self, the mystery of immortality, and the chariot of the soul. Third of the thirteen principal Upanishads.
Kena Upanishad — A dialogue between teacher and pupil on the unknowable Brahman that powers every sense yet cannot itself be sensed, culminating in the parable of the gods and the straw.
Mandukya Upanishad — The shortest of the principal Upanishads — twelve verses on the syllable Om, the four states of consciousness, and the fourth state beyond waking, dreaming, and deep sleep.
Mundaka Upanishad — The Upanishad of the shaven-headed seekers — three Muṇḍakas on higher and lower knowledge, the two birds on the same tree, and the arrow of the Self aimed at Brahman.
Prasna Upanishad — Six seekers approach the sage Pippalāda with six fundamental questions about the origin of life, the nature of breath, the states of sleep and dream, the syllable Om, and the person of sixteen parts.
Śvetāśvatara Upanishad — The eighth principal Upanishad; the root text of Shaiva Vedānta, uniquely holding both dualism and non-dualism — God and soul are distinct, yet beneath all multiplicity lies the one Brahma.