妙法蓮華經玄義 6.192

6.192

阿脩羅者，或居半須彌巖窟、或大海邊、或大海底。與諸天為憾，恒懷怖畏，雷鳴謂為天鼓，龍雨變成刀劍。此中眾生，先世善根，可發關宜。聖人赴對應之，軟言調伏，獲冥、顯兩益，是為阿脩羅果上清涼益也。

As for asuras, they dwell either in the rock caves on the slopes of Mount Sumeru, on the seashore, or at the bottom of the ocean. Bearing resentment toward the gods, they constantly harbor fear, taking the sound of thunder to be the heavenly drum, and the rain of dragons turns into knives and swords. If the sentient beings herein have wholesome roots from prior lives that can be stimulated when conditions are fitting, the sages respond accordingly, taming them with gentle words, so that they obtain both hidden and manifest benefits. This is the benefit of cooling upon the fruit of asuras.