摩訶止觀 3.182

3.182

修有多種，若觀心因緣生滅無常，修八正道者，即寫三藏之經。若觀心因緣即空，修八聖道，即寫通教之經。若觀心分別校計有無量種，凡夫二乘所不能測，法眼菩薩乃能見之，是修無量八正道，即寫別教之經。若觀心即是佛性，圓修八正道，即寫中道之經。明一切法悉出心中；心即大乘，心即佛性；自見己智慧與如來等。

Cultivation is of many kinds. If one contemplates the mind as arising and perishing through conditioned co-arising and impermanent, and cultivates the eightfold noble path, this is to inscribe the sutras of the Tripiṭaka. If one contemplates the mind's conditioned co-arising as identical to emptiness and cultivates the eightfold noble path, this is to inscribe the sutras of the shared teaching. If one contemplates the mind's discriminations and calculations as having immeasurable varieties, which ordinary persons and the two vehicles cannot fathom and only a bodhisattva with the Dharma-eye can see, this is cultivating the immeasurable eightfold noble path, which is to inscribe the sutras of the distinctive teaching. If one contemplates the mind as identical to the Buddha-nature and cultivates the eightfold noble path in a perfect manner, this is to inscribe the sutras of the middle way. It clarifies that all dharmas emerge from within the mind; the mind is itself the Mahāyāna, the mind is itself the Buddha-nature, and one sees for oneself that one's own wisdom is equal to that of the Tathāgatas.