大毘盧遮那成佛經疏 2.13

2.13

經云「能執所執」，謂有外道言：身中離識心，別有能執者即是真我，能運動身口意作諸事業。或有說言：能執者但是識心，其所執境界乃名真我，此我遍一切處。然內外身受心法，性皆從緣生、無有自性。是中所執能執，執尚不可得，何況我耶？亦由不觀我之自性，故作是說也。

The sūtra says: "Grasper and grasped." This refers to non-Buddhists who state: "Apart from the conscious mind within the body, there is another distinct grasper, which is the true self, capable of directing body, speech, and mind to perform all activities." Others state: "The grasper is merely the conscious mind, whereas the realm grasped by it is named the true self; this self is omnipresent." However, inner and outer body, feeling, mind, and phenomena all arise from conditions by nature, without intrinsic nature. Among these, grasp and grasped—even grasping itself cannot be found, let alone a self! It is also because of not observing the intrinsic nature of the self that they make such statements.