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Pravacanasāra
transformation is the mode 'samaya'. The time (kāla) itself is the substantive-cause (upādāna kārana) as well as the instrumentalcause (nimitta kāraṇa) of the ürdhvapracaya of the time (kāla). For the upward-collection (ūrdhvapracaya) of the other five substances (dravya), the substantive-cause (upādāna kārana) is the substance (dravya) itself and the instrumental-cause (nimitta kāraṇa) is the ürdhvapracaya of the substance of time (kāla).
उप्पादो पद्धंसो विज्जदि जदि जस्स एगसमयम्मि । समयस्स सो वि समओ सभावसमवट्ठिदो हवदि 2-50॥
उत्पादः प्रध्वंसो विद्यते यदि यस्यैकसमये । समयस्य सोऽपि समयः स्वभावसमवस्थितो भवति ॥2-50॥
सामान्यार्थ - [यस्य समयस्य ] जिस कालाणुरूप द्रव्य समय का [ एकसमये] एक ही अति सूक्ष्मकाल समय में [ यदि] यदि [ उत्पादः] उत्पन्न होना [ प्रध्वंसः] विनाश होना [विद्यते] प्रवर्तता है तो [ सोऽपि] वह भी [ समयः] काल-पदार्थ [स्वभावसमवस्थितः ] अविनाशी स्वभाव में स्थिररूप [ भवति ] होता है।
The simultaneous origination (utpada) and destruction (vyaya) in form of the 'samaya'takes place in the substance of time (kāla dravya); it also exhibits permanence (dhrauvya), being established in own-nature (svabhāva).
Explanatory Note: The 'samaya' is the mode (paryāya) of the substance of time (kāla dravya). There is the origination (utpāda) of the new mode and the destruction (vyaya) of the old mode as the indivisible atom of matter (pudgala-paramāņu) traverses slowly from one time-atom (kālāņu) to the other. The origination
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