Mbh 12.204.1a

"'"Manu said, 'As in a dream this manifest (body) lies (inactive) and the enlivening spirit in its subtile form, detaching itself from the former, walks forth after the same manner, in the state called deep slumber (or death), the subtile form with all the senses becomes inactive and the Understanding, detached from it remains awake. The same is the case with Existence and Non-Existence.[683] As when quantity of water is clear, images reflected in it can be seen by the eye, after the same manner, if the senses be unperturbed, the Soul is capable of being viewed by the understanding. If, however, the quantity of water gets stirred, the person standing by it can no longer see those images. Similarly, if the senses become perturbed, the Soul can no longer be seen by the understanding. Ignorance begets Delusion. Delusion affects the mind. When the mind becomes vitiated, the five senses which have the mind for their refuge become vitiated also. Surcharged with Ignorance, and sunk in the mire of worldly objects, one cannot enjoy the sweets of contentment or tranquillity. The Soul (thus circumstanced), undetached from its good and evil acts, returns repeatedly unto the objects of the world, in consequence of sin one's thirst is never slaked. One's thirst is slaked only when one's sin is destroyed. In consequence of attachment to worldly objects, which has a tendency to perpetuate itself, one wishes for things other than those for which one should wish, and accordingly fails to attain to the Supreme.[684] From the destruction of all sinful deeds, knowledge arises in men. Upon the appearance of Knowledge, one beholds one's Soul in one's understanding even as one sees one's own reflection in a polished mirror. One obtains misery in consequence of one's senses being unrestrained. One obtains happiness in consequence of one's senses being restrained. Therefore, one should restrain one's mind by self-effort from objects apprehended by the senses.