瑜伽論記 17.427

17.427

景云：一解則樂取境發動，故名發悟；二解，相應作意策支於樂，故云也。

Jing says: One explanation is that pleasure grasps the object and is stirred, hence it is called 'awakening'; a second explanation is that associated mental application urges the factor toward pleasure, hence it is said.