肇論新疏 2.142

2.142

妄心妄境相因相待互各生起，心境迢然有能所知。非所知者，境未對心之時亦未為境。生於知者，由現前境牽起內心。此即因境生心，心故能知。故《起信》云：「復次境界為緣，故生六種相。」即六麁事識分別取著，是名知也。知亦生所知者，謂因心生境也。由心分別，境亦隨生。知者，分別也。古德云：「未有無心境，曾無無境心。」

The deluded mind and deluded object mutually cause and depend upon one another, each giving birth to the other; mind and object are distinct, having the grasper and grasped of knowing. "Is not the known" means that when the object has not yet confronted the mind, it is not yet an object. "Born of knowing" means that due to the present object, the internal mind is drawn forth. This is the mind being born due to the object, and therefore the mind can know. Thus the Awakening of Faith states: "Furthermore, with external objects as conditions, the six kinds of marks are produced," which refers to the discrimination and grasping of the six coarse phenomena-consciousnesses, and this is called knowing. "Knowing also gives birth to the known" means that the object is born due to the mind. Due to the mind's discrimination, the object also arises accordingly. "Knowing" is discrimination. An ancient worthy said: "There has never been an object without mind, nor has there ever been a mind without object."