The śivopāsana mantraḥ found in the Taittirīya Āraṇyaka, is a powerful Vedic invocation uniquely central to the Śaiva upāsanā tradition. Unlike other mantras that glorify Śiva in mythic or devotional tones, this mantra emphasizes the immanence of Rudra in all elements of the cosmos: fire, water, plants, and beyond. It is used in Vedic rituals to invoke the all-pervading presence of Rudra not just as a deity, but as the inner essence of nature and consciousness. This mantra is often recited before meditation or during ātmārpaṇa (self-offering), affirming unity with the divine principle that permeates all existence.