Ajiva

Ajiva is the non-living: in Jain metaphysics the second of the two fundamental categories of reality alongside jiva. Jain thought divides ajiva into five substances, and the list is unusual among Indian schools for two of its members.

Pudgala, matter, is the only ajiva substance possessing form, and it is composed of atoms capable of combining. Karmic matter is a subtle variety of pudgala, which is what makes Jain karma theory physical rather than metaphorical, and light, sound, smell and the body are pudgala as well.

Akasha, space, provides the room in which everything else exists. Jainism distinguishes the occupied universe, the loka, from the infinite empty space beyond it.

Dharma and adharma, in Jain usage alone among Indian systems, are not moral terms at all but the media of motion and of rest, the conditions that make movement and stillness possible without themselves causing either, as water permits a fish to swim without propelling it and the ground permits a traveller to halt without stopping them. Their function in the system is structural: they define the boundary of the occupied universe, since motion is possible only where the medium of motion is present. This is why the loka has an edge, and why liberated souls, which rise on release, come to rest at its summit instead of continuing outward forever. No other Indian school posits these two substances, and they are among the most striking features of Jain cosmology.

Kala, time, has a disputed status within Jainism itself: the Digambara tradition generally counts it as a sixth substance, and the Svetambara tradition has often treated it as a mode of the others rather than an independent substance.

Together jiva and ajiva constitute the whole of reality on the Jain account, and the doctrine is realist and pluralist throughout, both categories are eternal and uncreated, neither is reducible to the other, and there is no creator anywhere in the scheme. The Tattvartha Sutra organises the system around seven categories that combine these two with the processes of influx, bondage, stopping, shedding and liberation, so that metaphysics and soteriology are presented as a single connected scheme rather than as two subjects.

That Jain metaphysics treats motion and rest as requiring their own distinct substances, dharma and adharma, rather than analyzing motion as a change of place, is unusual enough that a brief comparison with how other traditions handled the problem clarifies what the Jain move accomplishes.

Aristotle, addressing a similar problem, argued that place (topos) is itself something real, not merely a relation between bodies, because motion needs somewhere to occur and something to be relative to; but he located this requirement in place and in a hierarchy of natural motions proper to each element rather than positing a separate substance whose function is to enable motion, and had no counterpart to a substance enabling rest.

Nineteenth-century physics faced a comparable problem: needing a medium through which light waves could propagate, physicists posited the luminiferous ether, a substance filling all space whose sole function was to make wave propagation possible, abandoned once Einstein's special relativity showed propagation did not require one. The comparison is instructive because it fails informatively: the ether was posited to solve an empirical problem and was falsifiable and discarded, whereas dharma and adharma were posited within a metaphysical scheme not answerable to observation, to solve a structural puzzle, why an otherwise unbounded universe of souls and matter has a definite, bounded shape, the loka, with liberated souls rising to a fixed summit rather than ascending forever.

The Jain solution is therefore best understood not as primitive physics but as a metaphysical answer to a cosmological question, why the universe has an edge at all, a question most other traditions either answer differently or do not pose in the same terms.