The genus of water is that generality which is found with intimate relation in water, being also found in intimate relation in river and sea. The genus of fire is that generality which is found with intimate relation in fire, being also found with intimate relation in the moon and gold. The genus of air is that which is immediately subordinate to substance, and is found with intimate relation in the organ of the skin.[169] As ether, space, and time, from their being single, cannot be subordinate genera, their several names stand respectively for their technical appellations. Ether is the abode of particularity, and is found in the same subject with the non-eternal (_janya_) special quality which is not produced by contact.[170] Time is that which, being a pervading substance, is the abode of the mediate cause[171] of that idea of remoteness (_paratva_) which is not found with intimate relation in space;[172] while space is that pervading substance which possesses no special qualities and yet is not time.[173] The general terms _átmatva_ and _manastva_ are the respective definitions of soul (_átman_) and mind (_manas_). The general idea of soul is that which is subordinate to substance, being also found with intimate relation in that which is without form[174] (_amúrtta_). The general idea of mind is that which is subordinate to substance, being also found existing with intimate relation in an atom, but [unlike other atoms] not the intimate cause of any substance. There are twenty-four qualities; seventeen are mentioned directly in Kaṇáda's Sútras (i. 1, 6), "colour, taste, smell, touch, number, quantity, severalty, conjunction, disjunction, remoteness, proximity, intelligence, pleasure, pain, desire, aversion, and effort;" and, besides these, seven others are understood in the word "_and_," viz., gravity, fluidity, viscidity, faculty, merit, demerit, and sound. Their respective genera (_rúpatva_, &c.) are their several definitions. The class or genus of "colour" is that which is subordinate to quality and exists with intimate relation in blue. In the same way may be formed the definitions of the rest.