What is Vasubandhu?
Vasubandhu (fl. 4th–5th century CE) was an Indian Buddhist philosopher who shaped two of the most important traditions in Mahāyāna Buddhism. Early in his career he wrote the Abhidharmakośa, which became the standard Abhidharma textbook in East Asian and Tibetan monasteries. After converting to Mahāyāna under his half-brother Asaṅga's influence, he wrote the foundational treatises of the Yogācāra school, arguing that the apparent split between a perceiver and a world is a construction within consciousness, not a given feature of reality.
Yogācāra and Madhyamaka
The Yogācāra and the Madhyamaka, Nāgārjuna's school, are the two principal philosophical streams of Mahāyāna Buddhism. The question of whether they teach the same thing in different idioms, or two genuinely different things, has organised Buddhist philosophy for sixteen centuries. The Madhyamaka takes emptiness, the absence of intrinsic nature in any phenomenon, as its central analysis. The Yogācāra takes the constructive activity of consciousness as its central analysis. The major Tibetan synthesis, Śāntarakṣita's eighth-century Yogācāra-Svātantrika-Mādhyamaka, treats them as compatible levels: Yogācāra describes mind correctly at the conventional level, and Madhyamaka emptiness applies to that same consciousness as well as to its objects. The East Asian inheritance, including the Tiantai and Tendai schools, went further and folded Yogācāra categories into a Buddha-nature framework that became one of the engines of Zen, especially in the way the storehouse consciousness was rethought as an empty, luminous ground rather than a karmic substrate.
Two careers, one philosopher
The traditional biography, preserved in Paramārtha's sixth-century Chinese Life and reconstructed cautiously by modern scholarship, describes a single figure who composed two very different bodies of work across a religious conversion. In his early career Vasubandhu wrote the Abhidharmakośa (Treasury of Higher Doctrine), a verse compendium of the Sarvāstivāda school's Abhidharma analysis of mind, matter, and the path, with his own commentary (bhāṣya) critiquing the Sarvāstivāda from a Sautrāntika standpoint. The text became the canonical Abhidharma textbook of East Asian and Tibetan monastic training and is still memorised in the Tibetan shedra curriculum. In his later career, after Asaṅga converted him to the Mahāyāna, he produced the short treatises that established the Yogācāra school as a complete philosophical system: Viṃśatikā (The Twenty Verses), Triṃśikā (The Thirty Verses), Trisvabhāva-nirdeśa (The Treatise on the Three Natures), and a commentary on Maitreya's Madhyāntavibhāga. Erich Frauwallner argued in the mid-twentieth century that the two bodies of work belong to two different people who shared a name. The consensus has since moved back toward the traditional single-figure view, though the dating remains uncertain to within a century.
What Yogācāra claims
The Yogācāra school, also called Cittamātra (Mind-Only) and Vijñānavāda (the doctrine of consciousness), argued that what we take to be external, mind-independent objects are better understood as configurations of consciousness itself. The claim is not that nothing exists outside the mind in a crude sense. It is the more precise claim that the apparent split between a perceiver and a world outside is generated within the cognitive process, not encountered prior to it. Vasubandhu's Twenty Verses defends this against realist objections. The Thirty Verses maps the school's positive psychology: eight consciousnesses (aṣṭa-vijñāna) culminating in the ālayavijñāna or storehouse consciousness, which carries karmic seeds (bīja) between moments and lifetimes and is the substrate in which the self-grasping faculty (manas, the seventh consciousness) takes root. The Three Natures treatise then describes how ordinary experience and awakening relate by distinguishing the parikalpita (the imagined or constructed nature), paratantra (the dependent, causally arising nature), and pariniṣpanna (the perfected or ultimate nature).
Where the lineage shows in the index
Vasubandhu's own treatises are not in this index. The Abhidharmakośa and the Triṃśikā exist in English translation, but their editions are scholarly rather than the contemporary teaching titles the index principally collects. What the index carries is the downstream weight of his work in three registers. *The Awakening of Faith in the Mahāyāna*, traditionally attributed to Aśvaghoṣa but almost certainly composed in sixth-century China inside the Yogācāra inheritance, is the text most responsible for transmitting the ālayavijñāna doctrine and its Buddha-nature reading into the Chan, Zen, and Korean Sŏn lineages; the index carries it in the Hakeda translation. Junjirō Takakusu's *The Essentials of Buddhist Philosophy* devotes substantial sections to Yogācāra under its East Asian name Hossō and to the consequences of the Triṃśikā for the later schools. Thich Nhat Hanh on emptiness, signlessness, and aimlessness translates the storehouse-consciousness doctrine into Plum Village idiom through the seeds in the store consciousness image. His teaching on how Buddhist instruction takes us to ultimate truth extends the same psychology into the lived register of practice. Both Pema Chödrön's *When Things Fall Apart* and her course on awakening compassion operate inside the Yogācāra-influenced Tibetan inheritance: the school's account of how the manas grasps at a self is, in modified form, what the bodhicitta and tonglen practices those teachings transmit are designed to address.
What he isn't
Vasubandhu is not a Buddhist idealist in the European-philosophical sense, despite how Cittamātra can read in casual exposition. The claim is not that the external world is unreal because the mind is the only reality. It is that the subject-object structure in which the question of real versus unreal is ordinarily posed is itself a construction. This matters because the Yogācāra account is compatible with what the Madhyamaka would call empty dependent arising. The two schools are debating which analytical apparatus best captures the same phenomenology, not whether minds or objects exist. Nor is the ālayavijñāna a soul or self of the kind the anātman doctrine rules out. It is a karmic continuant that itself lacks intrinsic nature, and later development under Tiantai influence treats the storehouse as the ground that disappears when self-grasping dissolves. Vasubandhu was also not the school's founder in the way Nāgārjuna founded Madhyamaka. The systematic articulation of Yogācāra began with Asaṅga and the Bhūmi-class scriptures Asaṅga transmitted. Vasubandhu's distinctive contribution is the philosophical compression: the Triṃśikā's thirty-verse summary that became the school's portable textbook.
