Chatuhshataka (चतुःशतक - Catuḥśataka; བསྟན་བཅོས་བཞི་བརྒྱ་པ་ཞེས་བྱ་བའི་ཚིག་ལེའུར་བྱས་པ། bstan bcos bzhi brgya pa zhes bya ba'i tshig le'ur byas pa Tenchö Zhigyapay Tsikleur Jaypa; Four Hundred Verses), preserved in the Tibetan Tripitaka as Toh Number 3846 and partially translated in the Chinese Tripitaka as the Guang Bailun Ben (廣百論本, Taisho Number 1570), stands as the supreme companion treatise to Nagarjuna's Mulamadhyamakakarika (Toh Number 3824 and Taisho Number 1564) in the Madhyamaka school of Mahayana Buddhist philosophy. Composed in India during the 3rd century by Aryadeva (आर्यदेव - Āryadeva; འཕགས་པ་ལྷ། 'phags pa lha Pakpa Lha; flourishing circa 200–250), the foremost disciple and spiritual heir of Nagarjuna who originally hailed from Sri Lanka (Simhala), this monumental Shastra consists of sixteen chapters containing twenty-five verses each—totaling four hundred Sanskrit stanzas—that systematically translate the abstract dialectics of emptiness into practical spiritual transformation and polemical engagement with rival philosophical systems.
Structurally, the Chatuhshataka is divided into two distinct halves of eight chapters each, bridging foundational contemplative practice with rigorous ontological refutation. While Nagarjuna's Mulamadhyamakakarika focuses primarily on dismantling reified metaphysical categories within Buddhist Abhidharma debates, Aryadeva designed the Chatuhshataka both to guide bodhisattvas through the progressive abandonment of worldly illusions and to refute the realist doctrines of non-Buddhist Indian schools—including Samkhya, Vaisheshika, Nyaya, Mimamsa, and Jainism—demonstrating why Shakyamuni Buddha's teaching of the Middle Way surpasses every rival worldview.
The first half of the Chatuhshataka (Chapters One through Eight) addresses the four fundamental distorted perceptions (viparyasa) that bind sentient beings to samsara and dukkha across the six realms: mistaking the impermanent for permanent, suffering for happiness, impure for pure, and non-self for a self. In Chapters One through Four, Aryadeva guides practitioners to contemplate anicca (impermanence) and dukkha, cultivate fearless renunciation of sensual attachment and bodily pride, and dissolve egoistic conceit. By exposing how attachment to physical beauty, wealth, and social status fuels the three poisons of greed, hatred, and delusion, Aryadeva anchors lofty philosophical inquiry in sober mindfulness, non-attachment, and daily ethical conduct.
Continuing through Chapters Five through Eight of the Chatuhshataka, Aryadeva elucidates the conduct of a bodhisattva, the mastery of emotional afflictions, the abandonment of attachment to cyclic existence, and the preparation of the disciple for the profound realization of emptiness (शून्यता - śūnyatā; སྟོང་པ་ཉིད། stong pa nyid Tongpanyid). Emphasizing that genuine compassion, loving-kindness, generosity, merit, precepts, and equanimity are indispensable prerequisites for wisdom, Aryadeva famously observes that ordinary beings first abandon non-virtue through ethical conduct, next overcome the self in the middle stage, and finally abandon all views in the end—thereby harmonizing the Four Noble Truths and the Noble Eightfold Path with the supreme Mahayana ideal of bodhicitta.
In the second half of the Chatuhshataka (Chapters Nine through Sixteen), Aryadeva shifts to penetrating dialectical analysis, systematically refuting every form of inherent existence (स्वभाव - svabhāva; རང་བཞིན། rang bzhin Rangzhin) posited by eternalist and atomistic thinkers. Across these eight chapters, he dismantles the notion of permanent entities (Chapter Nine), the eternal Atman or personal self (Chapter Ten), permanent time (Chapter Eleven), speculative dogmatic views (Chapter Twelve), sense faculties and perceived objects (Chapter Thirteen), extreme views of identity and difference (Chapter Fourteen), conditioned arising and production (Chapter Fifteen), and the defense of Madhyamaka reasoning against charges of nihilism (Chapter Sixteen).
Philosophically, Aryadeva's Chatuhshataka illuminates how anatta (non-self), emptiness of self, and dependent origination (प्रतीत्यसमुत्पाद - pratītyasamutpāda; རྟེན་ཅིང་འབྲེལ་བར་འབྱུང་བ། rten cing 'brel bar 'byung ba Tenching Drelwar Jungwa) work together to liberate the mind from all conceptual extremes. Using vivid, memorable metaphors—such as comparing the illusory nature of phenomena to a firebrand whirled in a circle, a mirage, a dream, or an optical illusion—Aryadeva shows that while things appear vividly on the conventional level through dependent co-arising, they lack any intrinsic core upon ultimate analysis. Precisely because phenomena are empty, karma, rebirth, meditation, concentration, and skillful means operate coherently, allowing practitioners to realize innate Buddha-nature and nirvana right within conventional experience.
Over the centuries following Aryadeva's life in India, the Chatuhshataka exerted an immense influence on both Prasangika Madhyamaka and East Asian Sanlun philosophy. In India, major commentaries were composed by Dharmapala (commenting on the latter half of the treatise) and by Candrakirti, whose monumental commentary, the Bodhisattvayogacarachatuhshatakatika (Toh Number 3865 in the Tibetan Tripitaka), established Aryadeva alongside Nagarjuna as one of the two supreme authoritative progenitors of Prasangika Madhyamaka. Meanwhile, in China, Xuanzang translated both Aryadeva's root verses and Dharmapala's commentary into the Chinese Tripitaka in 650 as Taisho Number 1570 and Taisho Number 1571, enriching Chinese Yogacara and Madhyamaka debates.
In Tibet, the Chatuhshataka became one of the core textbooks studied across all four major traditions—Nyingma, Kagyu, Sakya, and Gelug—inspiring landmark commentaries and citations by Atisha, Longchenpa, Tsongkhapa, Rongtön Sheja Künrig, Gyaltsab Je, Rendawa Zhönnu Lodrö, Patrul Rinpoche, and Mipham Rinpoche. Standing forever alongside Nagarjuna's Mulamadhyamakakarika, Candrakirti's Madhyamakavatara (Toh Number 3861), and Shantideva's Bodhicaryavatara (Toh Number 3871 and Taisho Number 1662), Aryadeva's Chatuhshataka remains an indispensable guide to piercing right view and full awakening.