So the Light of the Sun and the Light of the Soul are different : the Sun is silent; the Soul can speak.

And just as this Darkness is not like itself, so neither is the Light (like itself). For this Sun by its Colour delights us, and not by its Voice, and the Soul which in his (Mani's) Teaching is akin to it (i.e., the Sun), delights by means of its Voice, and not by its Colour. And how is this Sun wanting in Thought (?), and how does the Darkness not possess Speech like its original Father? . . . the creation and learned . . . to give to them his Refining that he may bring them to the House of Life. And why does the Moon go on quietly, and why are the stars in silence? If they all come from an [P. 113, l.9] eloquent Nature, why are they not all eloquent like the Nature from which they come?