摩訶止觀 9.41

9.41

特勝發者：忽見氣息出、入、長、短，知來無所從，去無所至；入不積聚，出不分散。若約根本，即是麁、細住。若見息來去遍身，若約根本是未到地。而根本闇證，謂無身、床鋪等者，非實無也。如灰覆火上，愚者輕蹈之；如夜噉食、如盲觸婦，皆不暢其情。今有觀慧，見息遍身而定心明淨安隱，故異闇證也。

When the extraordinary manifests: One suddenly sees the breath going out, coming in, long, and short, and knows that it comes from nowhere and goes nowhere, neither accumulating upon entering nor dispersing upon exiting. In terms of the fundamental [dhyānas], this corresponds to the coarse and subtle abide-states. If one sees the breath coming and going throughout the entire body, in terms of the fundamental [dhyānas] this corresponds to the threshold stage. Yet in the dark realizations of the fundamental, they claim that there is no body, bed, or mat, which is not an actual absence. It is like ashes covering a fire, which a fool lightly treads upon; or like eating in the night, or like a blind person touching a woman—none satisfy the true circumstances. Here, having the wisdom of contemplation, one sees the breath pervading the body while the concentrated mind is bright, pure, and secure; hence it differs from dark realization.