大乘義章 1.117

1.117

次辨其實。既空情情相，妄想心息，便見真實如來藏性自體法界祕密法門，是其實也（此三門竟）。

Next, the third [gate] clarifies its reality. Once both sentiment and the characteristics of sentiment are emptied, and the mind of deluded conceptualisation ceases, one then perceives the secret Dharma-gate of the intrinsically real tathāgatagarbha nature, the dharmadhātu. This is its reality. (This concludes the third gate.)