大乘起信論裂網疏 3.60

3.60

問：若無他人能見心者，云何說有他心智通？答：由起妄念，妄有緣影，遂令他心智者托此為質，變相而緣，名了他心。其實緣影即是所變相分之影，非是心體亦非見分，心體及心見分並無形相，決不可見。故如來云：「我以佛眼猶不能見眾生之心，云何癡人說有心相可得也。」

Question: If no other person can see the mind, how can it be said that there is the supernormal knowledge of knowing the minds of others? Answer: Because of giving rise to false thoughts, falsely there are the images grasped as conditions; this causes the possessor of the knowledge of others' minds to rely on these as the fundamental substance, transforming marks and taking them as conditions, which is termed 'knowing others' minds'. In fact, the images grasped as conditions are simply the images of the transformed perceived part, not the essence of the mind, nor the perceiving part. The essence of the mind and the mind's perceiving part are entirely devoid of physical form and are decisively unseeable. Therefore the Tathāgata said: 'Even with the Buddha-eye, I still cannot see the minds of sentient beings; how can foolish people say that there are marks of the mind to be apprehended?'