Mbh 12.248.1b

The senses again, though (apparently different) should all be taken as included within the Understanding. The senses, which are engaged in bearing impressions of form, scent etc., should all be subdued.[1051] When a particular sense becomes subservient to the Understanding, the latter though in reality not different (from that sense), enters the Mind in the form of existent things. Even this is what happens with the senses one after another (separately and not simultaneously) with reference to the ideas that are said to be apprehended by them.[1052] All the three states that exist (viz., Sattwa, Rajas, and Tamas), inhere to these three (viz., Mind, Understanding, and Consciousness) and like the spokes of a car-wheel acting in consequence of their attachment to the circumference of the wheel, they follow the different objects (that exist in Mind, Understanding, and Consciousness).[1053] The mind must make a lamp of the senses for dispelling the darkness that shuts out the knowledge of the Supreme Soul. This knowledge that is acquired by Yogins with the aid of all especial agency of Yoga, is acquired without any especial efforts by men that abstain from worldly objects.[1054] The universe is of this nature (viz., it is only a creation of the understanding). The man of knowledge, therefore, is never stupefied (by attachment to things of this world). Such a man never grieves, never rejoices, and is free from envy (at seeing another possessing a larger share of earthly objects). The Soul is incapable of being seen with the aid of the senses whose nature is to wander among all (earthly) objects of desire. Even righteous men, whose senses are pure, fail to behold the soul with their aid, what then should be said of the vicious whose senses are impure? When, however, a person, with the aid of his mind, tightly holds their reins, it is then that his Soul discovers itself like an object (unseen in darkness) appearing to the view in consequence of the light of a lamp.