瑜伽論記 22.42

22.42

First, with respect to the teaching: 'therefore it is called training, because of the purity of forbearance and moral discipline'—bringing up forbearance and so forth. Regarding 'Furthermore, for the sake of tranquility up to therefore it is called training': tranquility eliminates transgressions of moral discipline, obtains the coolness of moral discipline, and eradicates karmic defilement, hence it is called training. Regarding 'Furthermore, one should know from the aforementioned characteristics up to and from cause and fruit': re-explaining the etymology, according to the gateway of etymological explanation there are specifically these five to explain the derivation of the name; moral discipline derives its name from characteristics, up to deriving its name from cause and fruit.