They moreover believe that the several risings of the river Nile bear a certain proportion to the variations of light in the moon. For they say that its highest rise, which is at Elephantine, is eight and twenty cubits high, which is the number of its several lights and the measures of its monthly course; and that at Mendes and Xois, which is the lowest of all, it is six cubits high, which answers the half-moon; but that the middlemost rise, which is at Memphis, is (when it is at its just height) fourteen cubits high, which answers the full moon. They also say that the Apis is the living image of Osiris, and that he is begotten when a prolific light darts down from the moon and touches the cow when she is disposed for procreation; for which reason many things in the Apis bear resemblance to the shapes of the moon, it having light colors intermixed with shady ones. Moreover, upon the kalends of the month Phamenoth they keep a certain holiday, by them called Osiris’s ascent into the moon, and they account it the beginning of their spring. Thus they place the power of Osiris in the moon, and affirm him to be there married with Isis, which is generation. For which cause they style the moon the mother of the world, and believe her to have the nature both of male and female, because she is first filled and impregnated by the sun, and then herself sends forth generative principles into the air, and from thence scatters them down upon the earth. For that Typhonian destruction doth not always prevail; but it is very often subdued by generation and fast bound like a prisoner, but afterwards gets up again and makes war upon Horus. Now this Horus is the terrestrial world, which is not wholly exempted from either generation or destruction.