瑜伽論記 19.35

19.35

The eighteenth section explains seven dharmas that should be correctly understood by one who wishes to realize samādhi. Jing says: first, the cause of internal deterioration of concentration, namely indolence: because of indolence in the internal mind, lethargy and sleep arise, hence indolence is the cause; second, the cause of external deterioration of concentration, namely agitation: because of agitation toward external objects as the cause, one grasps at distraction regarding the five desires; third, internal deterioration of concentration, namely lethargy and sleep: arising from indolence, lethargy and so forth are precisely the deterioration, either deterioration of what has not yet been attained or of what has already been attained; being hindered by internal conditions, it is called internal; fourth, external deterioration of concentration, namely distraction regarding the sublime five desires: grasping at the five desires due to external agitation also applies to both kinds of deterioration; being hindered by external conditions, it is called external; fifth, the antidote to internal deterioration of concentration and its cause, namely properly grasping signs and correctly observing: by properly grasping the signs of the objective sphere, one can leave indolence, lethargy, and sleep; sixth, the antidote to external deterioration of concentration and its cause, namely observing impurity in the body itself: observing one's own and others' bodies as impure can eliminate agitation and the five desires; seventh, the support and foundation of those two antidotes, namely the perception of light: the initial observation of objective signs and the observation of impurity rely upon the perception of light.