瑜伽論記 6.297

6.297

第二覩瞻中，若不先作意忽爾見色，名覩即是卒爾眼識及同時意識。若先作意復見色等名瞻，是等流二識。言不應覩瞻者，謂女色等，知覩瞻時不解勞睡眠或覩破壞興厭行時，即可覩瞻餘時不應，如所應覩等，知所為為生長道故須覩瞻。若增煩惱不應覩瞻。

Second, in looking and gazing: if one unexpectedly sees visible form without prior attention, it is called 'looking' (du), which is the instantaneous visual consciousness and the simultaneous mental consciousness. If one first directs attention and then sees visible form and so forth, it is called 'gazing' (zhan), which is the two consciousnesses in equal outflow. 'What should not be looked at or gazed upon' refers to women's forms and so forth; knowing the time to look and gaze means when one is not dispelling fatigue or sleepiness, or when observing decay to generate the practice of revulsion, then one may look and gaze, while at other times one should not; 'in accordance with what should be looked at', etc., means knowing that what is done is for the purpose of cultivating the path, and thus one must look and gaze; if it increases defilements, one should not look or gaze.