Sūtras
Core Mahāyāna canon
The texts at the centre of practice
A sūtra (Sanskrit sūtra, literally thread) is a Buddhist scripture: a discourse traditionally attributed to the Buddha, transmitted orally for centuries before being written down. Mahāyāna sūtras took shape between the 1st century BCE and the 6th century CE, were translated from Sanskrit into Chinese during the great translation period (2nd–8th c.), and from Chinese radiated into Korean, Japanese, and Vietnamese practice.
The four gathered here circulate through nearly every Zen, Chan, Sŏn, and Thiền hall. The Heart and Diamond carry the prajñāpāramitā teaching of emptiness; the Platform Sūtra records the dharma of the Sixth Patriarch Huineng — the only sūtra composed in China; the Lotus, especially its Universal Gate chapter (Kannon-gyō), is the most-chanted passage in Sōtō and Rinzai daily liturgy.
Each is offered here in multiple editions: the original Sanskrit, the canonical Chinese (Xuanzang, Kumārajīva, Zongbao), the Sino-Japanese chant, and several translations into European languages. The switcher above each text keeps the reader anchored at the same passage when you flip between languages.
The four core sūtras
- Heart Sūtra
The shortest and most universally chanted Mahāyāna text — the prajñāpāramitā teaching of emptiness condensed to a single page. Daily liturgy in nearly every Zen, Chan, Sŏn, and Thiền hall.
- Diamond Sūtra
The Vajracchedikā Prajñāpāramitā — the sūtra Huineng heard recited at the marketplace, awakening on the line ‘a Bodhisattva should produce a thought attached to nothing.’
- Platform Sūtra
The Sixth Patriarch Huineng's autobiography and dharma talks — the only sūtra composed in China and the closest thing Chan/Zen has to a sectarian charter.
- Lotus Sūtra
Saddharma Puṇḍarīka Sūtra — the Mahāyāna sūtra of the One Vehicle. The Universal Gate chapter (Kannon-gyō / Avalokiteśvara) is chanted daily in Sōtō, Rinzai, and Plum Village halls; the Daimoku 南無妙法蓮華經 is the practice of the Nichiren tradition.
Practical: how to chant
The Sino-Japanese chant (Hannya Shingyō, Kannon-gyō) sits as a chip on each sūtra's page — alongside the translations. If you're new to chanting, the how-to-chant guide walks through breath, tempo, the mokugyō, and what to do when you don't know the words yet.
A note on translations
Every edition on this site is in the public domain or under a permissive Creative Commons licence (CC BY, CC BY-SA). Modern copyrighted renderings — Conze, Red Pine, Thich Nhat Hanh, Yampolsky, Burton Watson, the 84000 collection — are deliberately excluded so the texts can be read, quoted, and re-circulated freely.
The Heart Sūtra is given in full in every language. The Diamond, Platform, and Lotus are presented as faithful selections from the canonical public-domain editions (Müller's SBE for Sanskrit; the Taishō Tripiṭaka for Chinese; Kern–Nanjio's Bibliotheca Buddhica for the Lotus Sanskrit), with each section linked back to the authoritative full text on the Internet Archive.
French and German coverage rests on three nineteenth-century orientalists whose work is now in the public domain: Eugène Burnouf's Lotus de la Bonne Loi (1852, the first Western Lotus), Léon Feer's L'essence de la science transcendante (1866) and Charles de Harlez's Vajracchedikā (1892), and Max Walleser's Prajñāpāramitā (1914). Spanish, Portuguese, Vietnamese, Korean, and modern East-Asian vernacular renderings of these sūtras are nearly all under copyright; we will land them as public-domain or CC-BY contributions become available.