Mbh 12.214.2c

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. In the midst of even our dreams passion having birth in imagination assails the mind, with the result that the duct already named, viz., Manovaha, throws out the vital seed born of desire. The great and divine Rishi Atri is well-conversant with the subject of the generation of the vital seed. The juices that are yielded by food, the duct called Manovaha, and the desire that is born of imagination,--these three are the causes that originate the vital seed which has Indra for its presiding deity. The passion that aids in the emission of this fluid is, therefore, called Indriya. Those persons who know that the course of vital seed is the cause of (that sinful state of things called) intermixture of castes, are men of restrained passions. Their sins are regarded to have been burnt off, and they are never subjected to rebirth. He that betakes himself to action simply for the purposes of sustaining his body, reducing with the aid of the mind the (three) attributes (of Goodness, Passion, and Darkness) into a state of uniformity, and brings at his last moments the vital breaths to the duct called Manovaha, escapes the obligation of rebirth.[751] The Mind is sure to gain Knowledge. It is the Mind that takes the form of all things. The minds of all high-souled persons, attaining to success through meditation, become freed from desire, eternal, and luminous.