大方廣圓覺修多羅了義經略疏 1.704

1.704

後、觀心無我。夫心無自相，託境方生。境性本空，由心故現。根塵和合，似有緣心。內外推之，何是其體？長輪生死，由不了心，苟能了之，圓覺自現。故《首楞》云：「狂性自歇，歇即菩提。」勝淨妙明，不從人得。文中二：一、尋伺觀。

Next, the contemplation that the mind has no self. Now, the mind has no intrinsic mark of its own; it arises only by relying on objects. The nature of objects is fundamentally empty; they appear only due to the mind. When sense faculties and sense objects combine, an intentional mind seemingly exists. When investigating it internally and externally, what is its substance? Long revolving in saṃsāra is due to not comprehending the mind; if one can comprehend it, perfect enlightenment will manifest of itself. Hence the Śūraṅgama-sūtra states: 'The mad nature ceases of itself; its cessation is bodhi.' Supreme, pure, wondrous, and luminous, it is not obtained from another. In the text there are two parts: first, the investigative contemplation.