Tathāgatagarbha Sūtra
The earliest sutra explicitly teaching Buddha-nature in all beings.
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EXPOSITION OF THE TATHĀGATAGARBHA SŪTRA
Context
The Tathāgatagarbha Sūtra is a sutra of the Northern Mahayana tradition, regarded as the most important canonical document on the doctrine of Buddha-nature. This sutra was composed during the period of vigorous Mahayana development, around the second to third centuries CE, marking a profound transformation in the understanding of the nature of the path to awakening.
Before the appearance of the Tathāgatagarbha Sūtra, Buddhist schools primarily focused on the doctrines of impermanence, non-self, and suffering. Mahayana, however, developed a new view: all sentient beings already possess Buddha-nature, that is, the innate capacity to become a Buddha. This sutra is an important turning point, openly and comprehensively teaching for the first time the presence of the Buddha-nature in all forms of life.
Main Contents
The Tathāgatagarbha Sūtra affirms a fundamental truth: Buddha-nature is not something remote or reserved only for those who practice austerities. Instead, every sentient being, whether human, animal, or a being in another realm, already bears within itself a spark of Buddha-nature (Buddha-dhātu). This is precisely the "garbha," meaning womb, that which contains and nurtures the capacity to give birth to the perfect state of buddhahood.
The sutra teaches that this Buddha-nature is not defiled by afflictions (kleśa) and negative habitual tendencies. It is always clear, originally complete, only temporarily covered by ignorance (avidyā). As fire is wrapped in cold ashes while the spark still remains, Buddha-nature remains present in each sentient being despite the impurities surrounding it.
From this teaching follows a consequence of utmost importance: all sentient beings have the capacity to become Buddhas. No one is excluded, and no one is eternally "without capacity" (icchantika). This infinitely expands the scope of the Buddha Dharma's salvific power, transforming the Buddha Dharma from a path for exceptional practitioners into a path for everyone.
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