प्रकाशवच्चावैयर्थ्यात् ॥ १५ ॥
prakāśavaccāvaiyarthyāt || 15 ||
prakāśavat—Like light; ca—and; avaiyarthyāt—not being purportless.
15. And like light (taking form in connection with bodies having form, Brahman takes form in connection with Upadhis), because (texts ascribing form to Brahman) are not purportless.
If Brahman is formless, what about the texts which describe It as having form? Are they superfluous? If Brahman is without form then all Upasanas of the Brahman with form would be futile, for how can the worship of such a false Brahman lead to Brahmaloka and other spheres? This Sutra explains that they are not without a purpose. Just as light, which has no form, appears to be great or small according to the aperture through which it enters a room and yet has the virtue of removing the darkness in the room, even so the formless Brahman appears to have a form, as being limited by adjuncts like earth etc; and the worship of such an illusory Brahman can help one to attain Brahmaloka etc., which are also illusory from the absolute standpoint. Hence these texts are not altogether purportless. This, however, does not contradict the position already established, viz. that Brahman, though connected with limiting adjuncts, is not dual in character, because the effects of these cannot constitute attributes of a substance, and moreover these limiting adjuncts are all due to Nescience.