Biographical note
The traditional biographies (Bu-tön, Tāranātha), together with Candrakīrti’s brief account at the head of his commentary — cited by Gyel-tsap — make Āryadeva the son and heir of King Pañcaśṛṅga, born on the island of Siṃhala (Sri Lanka). He abdicated to take monastic ordination under the abbot Hemadeva. After completing the tripiṭaka he travelled to South India, where he met Nāgārjuna and became his disciple at Śrī Parvata; some accounts say he equalled or even surpassed his teacher. The most famous episode is the debate with the Śaivite Brahmin Mātṛceṭa (identified by Tāranātha with Mātṛceṭa/Aśvaghoṣa) at Nālandā, in which Āryadeva sacrifices an eye. In the yogic-siddha literature he is identified with Karṇaripa. Before passing away, Nāgārjuna entrusted the teaching to him, and Āryadeva in turn entrusted it to Rāhulabhadra. He is traditionally held to have attained the eighth Bodhisattva ground. Probable dates: literary activity c. 225–250 CE.
Position summary
With Nāgārjuna, Āryadeva is one of the two founding (“model”) authors of Madhyamaka (gzhung phyi mo’i dbu ma pa / phyi mo). Because the theses unique to the later Prāsaṅgika position are not explicitly stated in his texts, he is accepted as authoritative by all proponents of Madhyamaka tenets, across the sub-schools. His position simply is Nāgārjuna’s: phenomena lack intrinsic or objective existence of any kind, yet exist dependently, and the compatibility of dependent arising with the absence of inherent existence is the heart of the view. Candrakīrti’s Catuḥśatakaṭīkā later reads him explicitly from the radical Prāsaṅgika standpoint and places him in the same lineage as his MMK commentary, confirming the continuity Nāgārjuna → Āryadeva → Candrakīrti.
His distinctive contribution is less a new doctrine than a structural and supplementary one. The Catuḥśataka (Four Hundred Verses) is built in two halves: eight chapters on the ethical-meditative path (the means), and eight that refute wrong views and analyse emptiness. Candrakīrti and Gyel-tsap label the halves by conventional and ultimate truth. Where the Mūlamadhyamakakārikā concentrates on ultimate truth and refutes mainly Buddhist tenets (Vaibhāṣika, Sautrāntika), Āryadeva supplements it in two ways. He turns the analysis on non-Buddhist systems (Sāṃkhya, Vaiśeṣika, Naiyāyika), and he supplies the conventional-truth path that the MMK leaves implicit, drawing on Nāgārjuna’s Ratnāvalī (Precious Garland).
Hermeneutical approach
Āryadeva works wholly within the Mahāyāna framework, and he states its pedagogy in his own words. “First prevent the demeritorious, / Next prevent [ideas of a coarse] self. / Later prevent views of all kinds. / Whoever knows of this is wise” (v. 190 [8.15]). In the same run, those who want merit should not always be told of emptiness (v. 193), and ordinary people can be guided only by way of the ordinary (v. 194), which Gyel-tsap glosses as the conventional being needed to reach the ultimate (aryadeva-four-hundred-sonam-2008). Chapter VIII is the hinge of the treatise, and the commentators read the two halves by the Two Truths (བདེན་གཉིས་): the conventional established first, the ultimate disclosed second. This makes him a leading witness that the Two Truths is a teaching method, not merely an ontological distinction. Like Nāgārjuna, he treats reasoning and conceptuality not as obstacles but as essential tools for first gaining a sound intellectual understanding of emptiness. Reality, on this view, is profound but not ineffable or unknowable.
Key claims
- Graded teaching in Āryadeva’s own words — vv. 189–194 (8.14–8.19) set out an order of teaching (merit, then the coarse self, then all views) and warn against teaching emptiness to the unready; this is direct evidence that the framework, as pedagogy, is in a founding-generation treatise (see aryadeva-four-hundred-sonam-2008 and framework-necessity).
- The two-truths labelling of the halves is the commentators’ — Candrakīrti’s commentary, as Gyel-tsap quotes it, says the first eight chapters ripen the mindstream and the last eight show “the stages of the paths dependent on ultimate truth”; Gyel-tsap’s outline names the parts by the two truths. Candrakīrti rejects Dharmapāla’s division into “Teaching Hundreds” and “Disputation Hundreds” because the text shows the path “as an integrated sequentially connected totality”.
- Candrakīrti’s use of Āryadeva on the MMK — the no-position verse (v. 400 [16.25]) is the first authority Candrakīrti cites in defending Buddhapālita on MMK 1.1 (Prasannapadā §IV, candrakirti-prasannapada-mmk1-excerpt, Feast p. 581; Sprung 1979, p. 37, numbering it XVI.24); and he quotes v. 190 on MMK 18:6, after reading that verse as relative to its audience (sprung-lucid-exposition-1979, p. 177).
- The Catuḥśataka as commentary-and-supplement to the MMK — Gyel-tsap infers its commentarial status from the omitted homage verse; it supplements the MMK with the conventional path and the critique of non-Buddhist tenets.
- Emptiness of emptiness (ch. XVI) — even emptiness is not truly existent; the self-applying move that blocks reification of śūnyatā.
- Speculative before innate — the second half refutes speculative (philosophically acquired) conceptions of true existence as the necessary route to undermining the innate conception that binds beings to saṃsāra.
Related scholars
- Nāgārjuna — his teacher; Āryadeva is the direct disciple and entrusted successor, paired with him as co-founder of Madhyamaka.
- Candrakīrti — author of the Catuḥśatakaṭīkā, the only Indian commentary on the Catuḥśataka transmitted to Tibet; reads Āryadeva as Prāsaṅgika and continuous with Nāgārjuna.
- Buddhapālita / Bhāviveka — the next Indian generation, whose methodological split (prasaṅga vs svatantra) is itself framework-internal, as Āryadeva’s shared architecture helps establish.
- Gyel-tsap (Rgyal tshab Dar ma rin chen, 1364–1432) and Ren-da-wa — Tibetan commentators (see Catuḥśataka and aryadeva-four-hundred-sonam-2008); the Geluk reading emphasises the valid establishment of the conventional.
- Tāranātha — his much later, revisionist absorption of the Indian founders into zhentong is just the kind of contested reception that the Catuḥśataka’s clear Madhyamaka credentials resist.