tathā hi yadyatsthūlaṃ tat tat sūkṣmapracayātmakam yathā parvatādayaḥ sthūlaṃ cādyacākṣuṣamavayavidravyam iti svabhāvahetuḥ
For whatever is gross consists of an accumulation of subtle [parts], like mountains and so forth, and the first visually perceived substance which has parts is gross - this is a reason based on essential nature."