Purva-Mimamsa in its Sources c16.2

c16.2

Thus we arrive at the conclusion that the *Manas* or Mind, by itself, is found to be devoid of any such qualities as Colour, Odour and the rest, and, as such, it cannot lead the Soul to experience or cognise these qualities; hence for this, it stands in need of such other organs as may be characterised by these qualities; for the perception of Colour, for instance, the Mind will need the aid of an organ of which Colour is the distinctive quality; for the perception of Odour, the help of an Odorous Organ; and so on, with the perceptions of Touch, Sound, and Taste. Now we know that the organ of which Colour is the distinctive quality must be one constituted by *Tejas* or Light; as Colour is a feature of Light; and this proves the existence of the *Luminous Organ*, the Organ of Vision, as leading to the perception of Colour. Similarly the Organ with Odour as its distinctive quality must be one composed of *Earth*; as it is to Earth alone that Odour belongs; and this proves the existence of the *Earthly Organ*, the Olfactory Organ, which leads to the perception of Odour. The organ with Taste as its distinctive quality must be composed of Water, as it is to Water that Taste belongs; this proves the existence of the *Aqueous Organ*, the Gestatory Organ, which leads to the perception of Taste. The Organ with Sound as its distinguishing feature must be composed of *Ākāsha*, as it is to Ākāsha that Sound belongs; this proves the existence of the *Ākāshic Organ*, the *Auditory Organ*; which leads to the perception of Sound. Lastly, the Organ having Touch for its distinguishing quality must be composed by Air, as it is to Air that Touch belongs; and this proves the existence of the *Airy Organ*, the Tactile Organ, which leads to the perception of Touch.