瑜伽師地論略纂 13.49

13.49

論解二勝利：果安樂，謂得菩提樂；於因自在者，令心屬己，不令放逸。又即由前熏修心故，於果時得究竟故安樂，因中制治三性自在也。

The treatise explains the two excellent benefits: bliss of the fruit means attaining the bliss of bodhi; mastery over the cause means making the mind subordinate to oneself, not letting it be negligent. Furthermore, precisely due to the previous perfuming and cultivation of the mind, at the time of the fruit one attains culmination and therefore bliss, and within the cause one controls and disciplines the three natures with mastery.