瑜伽論記 6.273

6.273

前中云以有明俱心及有光俱心者，謂水火星月藥草珠寶是明，緣此之心名明俱心，唯日一種是光，緣此光心名光俱心，以日能發光隱蔽處俱事令見，餘月等不爾。

In the former part, regarding the phrase 'a mind accompanied by clarity and a mind accompanied by light': water, fire, stars, the moon, medicinal herbs, and jewels are 'clarity' (ming), and the mind that attends to these is called 'a mind accompanied by clarity'. The sun alone is 'light' (guang), and the mind that attends to this light is called 'a mind accompanied by light', because the sun can emit light and cause things that are obscured to be seen, whereas the moon and other things cannot.