俱舍論疏 1.284

1.284

論「心心所法至彼作用義」，第二釋處義也。舊譯名入，義不盡也。滅義是入義，但是其滅而不得生義。理實十二處作心、心所生長之處，亦作滅沒之處。今言處者，通其兩義。「訓釋詞者謂能生長心心所法名為處」者，舉一義訓釋。「是能生長彼作用」者，心、心所法先有體性，由十二處令行世取果，名為作用。

The treatise says: "Mind and mental factors... the meaning of their functions." This is the second, explaining the meaning of base (*āyatana*). The old translation called them 'entrances' (*ru*), but the meaning was not exhaustive. The meaning of cessation is the meaning of entrance, but it is only their cessation and does not capture the meaning of arising. In reality, the twelve bases serve as the place where mind and mental factors arise and grow, and also serve as the place where they cease and vanish. Now, calling them 'bases' (*chu*) encompasses both of these meanings. "The etymological explanation is that what can generate and grow mind and mental factors is called a base": this adduces one meaning as the etymological explanation. "It is able to generate and grow their functions": mind and mental factors already have intrinsic nature; the twelve bases cause them to operate in the world and grasp results, which is called their function.