釋摩訶般若波羅蜜經覺意三昧 1.19

1.19

問曰：觀欲念、念二運心相可爾。未念未起，則為無心，無心故，則無相可分別。念已已滅亦與無無異，無法即無相，云何可觀？

Question: To contemplate the characteristics of mind in the two movements of "intending to think" and "thinking" may be acceptable. But before a thought has arisen, there is no mind; because there is no mind, there are no characteristics that can be distinguished. And once a thought has already ceased, it is no different from nothingness; with no phenomenon, there is no characteristic. How, then, can they be contemplated?