The understanding is also afflicted, for the mind is said to be different from the understanding only when the mind is viewed regarding its chief function of getting impressions about whose certainty it is no judge. In sooth, however, the mind is identical with the understanding. The quality of Darkness which is in the understanding then overwhelms the Soul itself that lies over that understanding sullied by Darkness like an image upon a mirror.
पृथग्भूतं मनो बुद्धया मनो भवति केवलम्॥ तत्रैनं विधृतं शून्यं रजः पर्यवतिष्ठते।