Within the Mahāparinirvāṇa Sūtra, compassion (karuṇā) appears as a defining manifestation of the Buddha’s eternal reality rather than a merely incidental virtue. The text portrays the Buddha’s continued teaching, even at the threshold of physical death, as arising from boundless compassion for sentient beings. His apparent passing is not depicted as abandonment, but as a compassionate mode of presence through the Dharma and the enduring Buddha-nature. In this way, compassion becomes the living expression of an unceasing concern for beings, grounded in the Buddha’s permanent and unchanging nature.

This compassionate nature is closely tied to the doctrine of Buddha-nature (tathāgatagarbha). Because all beings possess Buddha-nature, they are seen as both capable of awakening and worthy of limitless compassion. The sutra suggests that to realize Buddha-nature is simultaneously to uncover an innate capacity for great compassion, rather than to acquire something entirely new. Thus, compassion functions as both the proof and the fruit of awakening: it reveals what has always been present at the deepest level of being.

Compassion also underlies the Buddha’s use of skillful means (upāya). Teachings that may appear diverse or even severe are reinterpreted as compassionate adaptations to the varying capacities of listeners. Even the Buddha’s apparent death can be understood as a compassionate device to awaken disciples to impermanence and to the preciousness of the Dharma. In this perspective, every phase of the Buddha’s career, including his final instructions, is framed as a carefully calibrated response to suffering, guided by karuṇā.

For practitioners, the sutra presents compassion as the hallmark of authentic bodhisattva conduct. Bodhisattvas are encouraged to remain within saṃsāra out of concern for others, mirroring the Buddha’s own stance of not truly departing from beings. Genuine realization is described as moving beyond a narrow quest for personal liberation and embodying a vast, non-discriminating compassion for all. To cultivate such karuṇā is to participate in the Buddha’s ongoing compassionate activity, allowing the eternal nature of Buddhahood to be enacted in the world through one’s own thoughts, words, and deeds.