摩訶止觀 4.7

4.7

世間淺事非緣不合，何況出世之道？若無弄引，何易可階？故歷二十五法約事為觀，調麁入細，檢散令靜，故為止觀遠方便也。此五法，三科出《大論》，一種出《禪經》，一是諸禪師立。

If even shallow worldly matters do not coalesce without conditions, how much more so the supramundane way? If there were no preliminary lead-in, how could one easily ascend it? Therefore, passing through the twenty-five methods, one takes concrete matters as [the objects of] contemplation, attuning the coarse to enter the subtle, checking the scattered to make it tranquil; hence they are the remote expedients for calming and contemplation. Among these five methods, three categories are drawn from the Da zhidu lun, one from a Meditation Sūtra, and one was established by various meditation masters.