摩訶止觀 6.206

6.206

○第三、橫竪一心明止觀者：如上所說，橫竪深廣，破一切邪執、申一切經論、修一切觀行、逗一切根緣，迴轉無窮，言煩難見。今當結束，出其正意。若無生門千萬重疊，秖是無明一念因緣所生法，即空、即假、即中，不思議三諦；一心三觀、一切種智、佛眼等法耳。無生門既爾，諸餘橫門亦復如是。雖種種說，秖一心三觀，故無橫、無竪。但一心修止觀，又為二：一、總明一心，二、歷餘一心。

3. Explaining calming and contemplation in terms of horizontal and vertical in a single mind: As explained above, the horizontal and vertical are deep and broad, refuting all erroneous attachments, explicating all sūtras and treatises, cultivating all contemplation practices, adapting to all faculties and conditions, and turning infinitely; the words are cumbersome and difficult to grasp. Now I shall summarize them to bring out the correct meaning. Although the gate of non-arising has tens of millions of layers, it is merely the dharmas produced by causes and conditions in a single thought-moment of avidyā, which are identical to emptiness, identical to the provisional, and identical to the middle—the inconceivable three truths; the three contemplations in a single mind, sarvākārajñatā, the Buddha-eye, and such dharmas. Since the gate of non-arising is like this, all the other horizontal gates are also like this. Though spoken of in various ways, they are merely the three contemplations in a single mind; therefore there is neither horizontal nor vertical. Simply cultivating calming and contemplation in a single mind also has two parts: first, explaining the single mind generally; second, applying it through other single minds.