In the Mahāparinirvāṇa Sūtra, Buddha-nature (tathāgatagarbha) is portrayed as an inherent, indestructible essence present in all sentient beings. This universality is emphasized without exception: every being, regardless of current spiritual condition or moral failings, is said to possess this inner Buddha-element. The sutra thus rejects any elitist view of awakening as reserved for a spiritual few and instead grounds the path in a shared, latent potential. This Buddha-nature is not something newly produced by practice; it is already there, awaiting disclosure.

The text characterizes this inner reality with strikingly affirmative language: eternal (nitya), blissful (sukha), pure (śuddha), and even as ātman, “Self.” These descriptors stand in deliberate contrast to the impermanent, suffering, and impure nature of conditioned existence. By speaking of a “true Self,” the sutra does not endorse the ordinary, egoic self, but points to a deeper, unconditioned dimension that is identified with the Buddha’s dharmakāya, the Dharma-body that is not destroyed by physical death. In this way, the Buddha’s passing is framed not as annihilation, but as full abiding in that ever-present reality.

At the same time, this Buddha-nature is said to be obscured by defilements—ignorance, craving, and other afflictions—that conceal but never contaminate it. Traditional images liken it to a precious jewel wrapped in filthy rags or gold covered by dirt: the value and purity remain intact beneath the coverings. Spiritual practice, then, is understood as a process of uncovering or revealing what has always been there, rather than fabricating enlightenment from scratch. As these obscurations are gradually removed, the qualities of Buddha-nature manifest more clearly, culminating in Buddhahood.

The sutra’s use of rich, positive language also serves a corrective function in relation to misunderstandings of emptiness and no-self. Instead of presenting ultimate reality only in negative terms—what it is not—it affirms a profound, indwelling principle that is both the “true Self” and the ground of liberation. This does not negate the teaching of non-self at the conventional level, but reorients it by pointing beyond nihilistic interpretations toward a reality that, while described as eternal, blissful, self, and pure, ultimately transcends conceptual grasp. Awareness of this Buddha-nature becomes a powerful source of confidence and resolve, as beings recognize that the goal of the path is nothing other than the full realization of what has silently accompanied them all along.