仁王經疏 1.173

1.173

釋曰：第四、入大寂室。言三昧者，訛者訛略，依正梵音名三摩地，此云等持，離於沈掉故名為等，持心令住一境性故名之為持。此通定散，即別境中定數為體。而有大寂室三昧，自有兩釋：一云：真如空性，止觀所依，名大寂室。從境得名，故名大寂室；三昧，依主釋也。一云：定極寂靜，智慧所依，名大寂室三昧，即持業釋也。此上二種，現瑞勝緣。然釋此定，差別有三：一名三摩地，如前所說。二名三摩鉢底，此云等至。等義如前。至謂至極，謂彼寂靜至極處故。三名三摩呬多地，此云等引。等義如前說。引有三義：一平等能引、二或引平等、三或是平等所引發故。然此三定，各有寬狹。三摩地名，自心數中等持一法，通攝一切；有心位中心一境性，通定散位。三摩鉢底，通目一切有心無心諸定位中所有定體。等引地名，通目一切有心無心定位功德。

Explanation: Fourth, entering the Great Tranquil Chamber. As for the word "samādhi", it is an erroneous abbreviation; according to the correct Sanskrit phonetics it is called samādhi, translated here as "equipoise" (等持). Being free from laxity and agitation, it is called "equi-" (等); maintaining the mind so that it abides in one-pointedness, it is called "-poise" (持). This applies generally to both concentrated and dispersed states, and its substance is precisely the mental factor of concentration (samādhi) among the specific [mental factors]. As for having the samādhi of the Great Tranquil Chamber, there are naturally two explanations: One says: the emptiness-nature of tathatā, being that upon which calm abiding (śamatha) and special insight (vipaśyanā) rely, is called the "Great Tranquil Chamber." Taking its name from the cognitive object, it is therefore called the "Great Tranquil Chamber"; [in combination with] "samādhi", this is a tatpuruṣa compound. The other says: the absorption is exceedingly tranquil and is that upon which wisdom relies, so it is called the "Great Tranquil Chamber Samādhi"; that is a karmadhāraya compound. These two above are the superior conditions for manifesting the auspicious signs. Furthermore, in explaining this absorption, there are three distinctions: First, it is called samādhi, as explained before. Second, it is called samāpatti, translated here as "meditative attainment" (等至). The meaning of "equi-" is as before; "attainment" refers to reaching the utmost, meaning that that tranquility reaches the utmost point. Third, it is called the stage of samāhita, translated here as "equipoised state" (等引). The meaning of "equi-" is as explained before. "Poised" (引, leading/producing) has three meanings: first, being balanced, it can lead [to spiritual qualities]; second, or it leads to balance; third, or it is that which is led forth and produced by balance. However, these three absorptions each have their broad and narrow scopes. The name samādhi, being the single dharma of equipoise among the mental factors, subsumes everything; within states with mind, it is mental one-pointedness, covering both concentrated and dispersed states. Samāpatti generally designates all the actual substances of absorption within all meditative states, whether with mind or without mind. The name of the stage of samāhita generally designates all the merits of the meditative state, whether with mind or without mind.