The Great Epic of the Bhārata dynasty 12.207.17

12.207.17

daśa vidyāddhamanyo'tra pañcendriyaguṇāvahāḥ |
yābhiḥ sūkṣmāḥ pratāyante dhamanyo'nyāḥ sahasraśaḥ || 17 ||

That wise man who has betaken himself to the practice of this vow should, with an extended and enlightened mind, burn the sins in his mind which are all due to the quality of Passion. As the duct that bears away the refuse of the body is very closely connected with the body, even so the embodied Soul is very closely connected with the body that confines it. The different kinds of juices, passing through the network of arteries, nourish men's wind and bile and phlegm, blood and skin and flesh, intestines and bones and marrow, and the whole body. Know that there are ten principal ducts. These assist the functions of the five senses. From those ten branch out thousands of other ducts that are minuter in form. Like rivers filling the ocean at the proper season, all these ducts, containing juices nourish the body. Leading to the heart there is a duct called Manovaha. It draws from every part of the human body the vital seed which is born of desire. Numerous other ducts branching out from that principal one extend into every part of the body and bearing the element of heat cause the sense of vision (and the rest). As the butter that lies within milk is churned up by churning rods, even so the desires that are generated in the mind (by the sight or thought of women) draw together the vital seed that lies within the body.