adhiṣṭhānānṛjusthatvān nātmā sūryaṃ prapadyate / pāramaparyārpitaṃ santam avāgvṛttyāvabudhyate //
The perceiver does not apprehend the sun because [the sun] is not in a straight line with the bodily substratum [of the visual organ]; [rather] it cognizes [the sun] as being mediately presented through downward-moving [rays].