Vimalakīrti Sūtra
Introduction
The Vimalakīrti Sūtra (Vimalakīrtinirdeśa Sūtra) is one of the most cherished texts of Mahāyāna. It features Vimalakīrti, a layman of prodigious wisdom, who challenges the Buddha's greatest disciples and the Bodhisattvas, revealing that awakening is not reserved for monks but is accessible to all, in the most ordinary life.
Chapter IX — "The Gate of Non-Duality" — is the pinnacle of the sūtra. The Bodhisattvas each present their understanding of non-duality, then turn to Mañjuśrī, who declares that any speech is still a duality. Finally, they ask Vimalakīrti for his teaching.
His response has become legendary throughout the Zen tradition: absolute silence. This silence, praised by Mañjuśrī himself as the true expression of non-duality, is one of the foundational moments of the Chan spirit — long before Dōgen taught that silent zazen is the direct expression of awakening.
Chapter IX — The Gate of Non-Duality (excerpt)
於是文殊師利問維摩詰言。居士。我等各自說已。仁者當說。何等是菩薩入不二法門。
Then Mañjuśrī asked Vimalakīrti: "Venerable one, we have all spoken each in turn. Now it is your turn: what is the Bodhisattva's entry into the gate of non-duality?"
時維摩詰默然無言。
Then Vimalakīrti remained silent, without a word.
文殊師利歎曰。善哉善哉。乃至無有文字語言。是真入不二法門。
Mañjuśrī exclaimed: "Excellent, excellent! To have neither words nor language — that is truly entering the gate of non-duality."
說是入不二法門品時。於此眾中。五千菩薩。皆入不二法門。得無生法忍。
When this chapter on non-duality was thus expounded, in that assembly, five thousand Bodhisattvas entered the gate of non-duality and attained the patience of the non-arising of phenomena.
The Silence of Vimalakīrti — This passage is one of the most cited in Zen Buddhism. It illustrates the limit of language: non-duality cannot be spoken, only lived. It is in this spirit that Zen transmits "outside the scriptures" and that zazen, sitting in silence, is held to be the most direct expression of truth.