觀心論疏 3.6

3.6

Fourth, clarifying the neither-walking-nor-sitting samādhi: the above exclusively employed walking and sitting; since this differs from the above, in order to complete the four propositions, it is named 'neither walking nor sitting', but in truth it pervades walking, sitting, and all activities. Master Nanyue called it 'following one's own mind': whenever a thought arises, one immediately cultivates samādhi. The Pañcaviṃśatisāhasrikā Prajñāpāramitā calls it the 'mind-awakening samādhi': every inclination of the mind can be awakened to, recognized, and clearly understood. Although there are three names, it is truly one Dharma. Now explaining according to the sūtra: 'awakening' means shining and comprehending; 'mind' (yì) means mental concomitants; 'samādhi' is as explained before. When a practitioner contemplates the mind in a single thought-moment arising spontaneously, as the mental concomitants arise, one turns the illumination inward to contemplate them, not seeing any movement or turning, any root-source or ending, any place of coming or place of going; therefore it is called the mind-awakening samādhi. 'Following one's own mind' and 'neither walking nor sitting' can be understood by analogy to this, and so forth.