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Tattvarthasutra
[5.31 Since there is no permanent basis, there will never be an experience of homogeneity in that momentary result-series; that is, there will be no recognition of seeing something again as “this is the same,” because just as the stability of the subject object is necessary for recognition, the stability of the perceiving soul is also necessary. Similarly, if both sentient and non-sentient substances are completely changeless, then the diversity that is seen at every moment in this world formed by the mixture of the two substances will never arise. Therefore, Jain philosophy considers the theory of the permanence of results reasonable.
The eternal nature of reality through explanation
Tadbhavavyayam nityam: The reality is eternal as it does not deviate from its nature. The essence of a substance is to be characterized by production, depletion, and substance itself, and this essence is reality. The nature of reality is eternal, meaning it remains the same across all three times. It is not the case that in any substance or merely a substance, production, depletion, and substance can sometimes exist and sometimes not. At all times, all three aspects of production, etc., must exist. This is the eternality of reality.
Not abandoning one's own substance is the essence of all substances, and the unique results that arise and perish at every moment are production and depletion. The cycle of substance and production-depletion continuously operates in mere substance. No part of that cycle is ever lost; this is stated in this sutra. The previous sutra's mention of substance refers only to the permanent aspect of the substance, while this sutra speaks of eternality in relation to the unbroken nature of production, depletion, and substance—this is the difference between the substance discussed in the previous sutra and the eternality discussed in this sutra. 30.
Support for the multifaceted nature
Arpitānarpitā siddheḥ. 31. Every object is composed of many attributes because the engaged and disengaged (referring to specific expectation) shows a contradictory nature, and the unattached and unattached (referring to differing expectations) reveals a contrary form.