瑜伽師地論略纂 7.40

7.40

'One should arouse constant and diligent vigor' refers to donning armor. 'Firm' refers to applied preparation. 'Valiant' refers to non-regression. Not mentioning vigor without satiation is because this explains the cause of cultivation and does not speak of its fruit. Not mentioning vigor without inferiority is because donning armor and applied preparation are initial cultivations in the good, while non-regression alone is capable of enduring suffering. Subsuming the good and being free from suffering—these two are already complete, so vigor without inferiority is omitted. Therefore, only three are mentioned. This is as extensively explained regarding the five marks in chapter eighty-nine of the Yogācārabhūmi.