摩訶止觀 5.158

5.158

觀觀法時，不得能、所，心慮虛豁，朦朧欲開，但當勤觀開、示、悟、入。是為用「第一義以觀安心」。是為八番為法行人說安心也。

“When contemplating the contemplation of phenomena, one attains neither the subject nor the object; the thoughts of the mind are empty and open, hazily about to open up; one should simply diligently contemplate to open, indicate, awaken, and enter.” This is using “calming the mind by contemplating in accordance with the supreme truth.” These are the eight turns of explaining how to calm the mind for a person of the Dharma-practice type.