But now this light is not proper to the Moone, it doth not proceed from the rayes of the Sunne which doth penetrate her body, nor is it caused by any other of the Planets and Starres. Therefore it must necessarily follow, that it comes from the earth. The two first of these I have already proved, and as for the last, it is confidently affirmed by _Cælius_,[1] _Quod si in disquisitionem evocet quia, an lunari syderi lucem fœnerent planetæ item alii, asseveranter astruendum non fœnerare_. “If any should aske whether the other Planets lend any light to the Moone; I answer they doe not.” True indeed, the noble _Tycho_[2] discussing the reason of this light attributes it to the Planet _Uenus_, and I grant that this may convey some light to the Moone; but that it is not the cause of this whereof wee now discourse, is of itselfe sufficiently plaine, because _Uenus_ is sometimes over the Moone, when as shee cannot convey any light to that part which is turned from her. [Sidenote 1: _Progym. 1._] [Sidenote 2: _l. 20. c. 5._] It doth not proceede from the fixed starres, for then it would retaine the same light in eclipses, whereas the light at such times is more ruddy and dull. Then also the light of the Moone would not be greater or lesser, according to its distance from the edge of the earths shadow, since it did at all times equally participate this light of the starres. Now because there is no other body in the whole Universe, save the earth, it remaines that this light must necessarily be caused by that which with a just gratitude repaies to the Moone, such illumination as it receives from her.