首楞嚴義疏注經 5.183

5.183

觀味之因從何而有，空有、身心、若即若離，俱無生處。了知即觀察也。無生處故，塵味寂然，分別即息，能所亡泯，二俱絕朕，唯是一味清淨寶覺，故云從是開悟，即證無生忍也。

Contemplating the cause of flavor—from where does it arise? Empty or existent, body or mind, whether identical or separate, none of them is the place of arising. 'Realized and knew' means contemplating and observing. Because there is no place of arising, the dust of flavor is tranquil, conceptualization immediately ceases, and subject and object both vanish; both entirely leave no trace, being only the single flavor of pure, precious awareness. Hence they say 'we thereby awakened,' which is to realize the forbearance of non-arising dharmas.