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English Translation (preserving Jain terms):
[210] In Sarvārthasiddhi:
[5111] Due to the use of the general term 'pudgalānām' in the previous sūtra, there arises the implication that even the atoms (aṇus) have spatial parts. To refute this, the following sūtra is stated:
Atoms (aṇus) do not have spatial parts. ॥1॥ [6547] The remaining part of the sentence is 'spatial parts do not exist'. Why do they not exist? Because atoms are of the nature of a single spatial part. Just as in the case of the single space-point (ākāśa-pradeśa), there is no division of spatial parts, similarly, due to the atoms being of the nature of a single spatial part, there is no division of spatial parts. Moreover, there is no other substance smaller than the atom, so that its spatial parts could be designated.
[8548] To establish the substratum (ādhāra) of the aforementioned attributes (dharmādi) that are devoid of spatial parts, the following sūtra is stated:
The incorporation (avagāha) of the dharmādi substances is in the loka-ākāśa (cosmic space). ॥12॥ [8549] The meaning is that the incorporation of the mentioned dharmādi substances is not outside the loka-ākāśa. If the dharmādi substances have the loka-ākāśa as their substratum, then what is the substratum of the ākāśa? The ākāśa has no other substratum; it is self-established (sva-pratiṣṭha). If the ākāśa is self-established, then the dharmādi substances are also self-established. If another substratum is imagined for the dharmādi substances, then another substratum would also have to be imagined for the ākāśa. This would lead to an infinite regress. But this is not a defect, because there is no substance with a greater dimension than the ākāśa in which the ākāśa could be said to be situated. The ākāśa is infinite in all directions. However, the ākāśa is spoken of as the substratum (ādhāraṇa) of the dharmādi substances due to the perspective of the vyavahāra-naya (empirical viewpoint). From the standpoint of the evam-bhūta-naya (the perspective of the true nature), all substances are self-established. As it is said, "Where do you reside? Within the self." The conclusion is that the dharmādi substances are not outside the loka-ākāśa, and this is the fruit of the conception of the substratum-substrate (ādhārādheyakalpanā) established here.