起信論疏筆削記 8.42

8.42

"This truth...", etc., secondly, bundles the four meanings to form two gates. The first meanings are the unchanging within the true and the emptiness of essence within the deluded; through these two meanings the gate of tathatā is established. When this gate encompasses the deluded, the deluded is empty in essence; when it encompasses the true, the true is unchanging; defilement and purity are equal, of a single characteristic and characteristicless; hence this gate exists. The second meanings are according with conditions within the true and effecting phenomena within the deluded; through these two meanings the gate of arising and ceasing is established. When this gate encompasses the true, the true accords with conditions; when it encompasses the deluded, the deluded effects phenomena; that is, it constitutes the differentiated marks of all defiled and pure dharmas; hence this gate exists.