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Dravyasamgraha
Three particles either combined or separate occupy one, two or three units of space according to the nature of the molecular combination. Similarly, molecules of numerable, innumerable and infinite atoms are accommodated in one, countable and countless units of space. Now, it stands to reason that the nonmaterial substances such as the media of motion and rest can both be accommodated in the same place at the same time without obstruction. But how is it possible in the case of material objects? It is possible even in the case of material objects, as these are capable of immersion or condensation and of taking subtle forms. For instance, the lights1 from several lamps in a room intermingle. It should be understood in this manner from the authority of the scriptures also. It has been said as follows.
"The universe is densely (without inter-space) filled with several varieties of infinite times infinite forms of matter of subtle and gross nature in all the directions (i.e., horizontally and vertically).”
Jain, S.A., Reality, p. 136-137.
Ācārya Umasvami's Tattvārthasūtra
37010: Toh-ETT 11
(5-25)
(Moleules) are formed by division (fission), union (fusion), and division-cum-union.
Ācārya Pujyapada's Sarvārthasiddhi That, which occupies one space-point and possesses the capacity to produce the modes of touch, taste, etc., is called an atom. Owing to the minuteness of its size, the atom is itself the
1 Light is a form of matter according to the Jaina view.
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