Mantrika Upanishad - Uses mantra and symbolic teaching to describe Brahman, the inner Self, and the relationship between the individual person and the universal reality.

Mundaka Upanishad - Distinguishes lower learning from higher knowledge of imperishable Brahman, using the image of two birds on one tree to explain the Self and the witness.

Maitrayani Upanishad - Discusses the Self, the cycles of existence, and liberation, combining Vedantic inquiry with yoga and meditation on the sacred syllable Om.

Maitreya Upanishad - A renunciation-focused dialogue that teaches detachment from worldly life and knowledge of the Self as the means to freedom.

Yajnavalkya Upanishad - Presents Yajnavalkya’s instruction on renunciation, the disciplines of the ascetic, and the inner knowledge that leads beyond worldly identification.

Yogakundalini Upanishad - Explains Kundalini yoga, including breath practices, the subtle channels and centers, and the awakening of spiritual energy toward realization.

Yogachudamani Upanishad - A yoga manual focused on Kundalini, chakras, breath, and the body’s subtle structure, describing practices intended to bring spiritual awakening.

Yogatattva Upanishad - Outlines yogic disciplines and stages, including posture, breath control, concentration, meditation, and the signs of progress toward liberation.

Yogatattva Upanishad - Outlines yogic disciplines and stages, including posture, breath control, concentration, meditation, and the signs of progress toward liberation.

Vajrasuchika Upanishad - Challenges birth-based claims to spiritual rank and argues that a true Brahmin is defined by knowledge of Brahman and inner virtue.

Sharabha Upanishad - A Shaiva text recounting Shiva’s fierce Sharabha form and asserting Shiva’s supreme power over cosmic forces and divine manifestations.

Shandilya Upanishad - A yoga text that explains ethical restraints and observances, posture, breath, sense withdrawal, concentration, meditation, and absorption.

Shivasankalpa Upanishad - Meditates on the mind as the instrument of intention, memory, and action, praying that it become clear, disciplined, and aligned with auspicious resolve.

Shukarahasya Upanishad - Presents secret Vedantic instruction associated with Shuka, explaining the great sayings and the knowledge by which the Self is recognized as Brahman.

Shri Krishna Upanishad - A Vaishnava text identifying Krishna with the supreme reality and explaining his divine forms, names, and relationship to the universe.

Shri Rama Purva Tapaniya Upanishad - The “prior” section of the Rama Tapaniya tradition, focused on Rama’s divine identity, sacred mantra, and meditative worship.

Shri Rama Rahasya Upanishad - A Vaishnava text teaching the spiritual significance of Rama’s name and mantra, together with forms of worship and the liberating knowledge they support.

Sarvasara Upanishad - Defines foundational Vedantic terms—including the Self, Brahman, bondage, liberation, and the states of consciousness—in a compact question-and-answer form.

Sita Upanishad - A Shakta-Vaishnava text presenting Sita as the supreme Goddess and describing her cosmic forms, mantra, and relationship to Rama and creation.

Sita Upanishad - A Shakta-Vaishnava text presenting Sita as the supreme Goddess and describing her cosmic forms, mantra, and relationship to Rama and creation.

Skanda Upanishad - A Shaiva-Vaishnava teaching associated with Skanda that emphasizes the unity of Shiva and Vishnu and the identity of the Self with the divine.