維摩經玄疏 5.49

5.49

四、明約觀心歷法悉是經者，一切萬法皆從心起，若心即是經，即諸法皆是經也。故《華嚴經》云：「欲知如來心，但觀眾生心。」譬如一微塵中，有三千大千世界經卷，無人知者，有人破此微塵，即見三千世界經卷。若破眾生一念無明心者，則一切諸佛所說之經皆顯現也。若行人能用觀心尋讀心經，即見佛性，住大涅槃也；於一切頓、漸、祕密、不定諸經，皆得明了。所以者何？觀心生滅，見一切三藏教橫竪分明；觀心不生滅，見一切通教橫竪分明；觀心假名，見一切別教橫竪分明；觀心中道，見一切圓教橫竪分明。四教對諸經，如前分別（一名不可思議解脫）。

Fourth, clarifying that in terms of contemplating the mind, progressing through all dharmas, all are sūtras: All myriad dharmas arise from the mind. If the mind is itself the sūtra, then all dharmas are sūtras. Therefore, the Avataṃsaka Sūtra says: 'If you wish to know the Tathāgata's mind, merely contemplate the minds of sentient beings.' For example, inside a single particle of dust there is a sūtra scroll of a great trichiliocosm, and no one knows it; if someone breaks open this particle of dust, they see the sūtra scroll of the trichiliocosm. If one shatters a single thought of ignorance in sentient beings, all the sūtras spoken by all Buddhas are fully revealed. If a practitioner can use contemplation of the mind to read and recite the mind-sūtra, they will see the buddha-nature and abide in great nirvāṇa; regarding all the sudden, gradual, esoteric, and indeterminate sūtras, they will clearly understand them all. Why is this? Contemplating the arising and ceasing of the mind, one sees all the Tripiṭaka teaching distinctly in its horizontal and vertical aspects; contemplating the mind as non-arising and non-ceasing, one sees all the shared teaching distinctly in its horizontal and vertical aspects; contemplating the mind as nominal, one sees all the distinctive teaching distinctly in its horizontal and vertical aspects; contemplating the middle way of the mind, one sees all the perfect teaching distinctly in its horizontal and vertical aspects. The correlation of the four teachings with the various sūtras is as distinguished previously (also titled Inconceivable Liberation).