“I say that the heaven of the Moon resembles Grammar; because it may be compared therewith; for if the Moon be well observed, two things are seen peculiar to it, which are not seen in the other stars. One is the shadow in it, which is nothing but the rarity of its body, in which the rays of the sun cannot terminate and be reflected as in the other parts. The other is the variation of its brightness, which now shines on one side, and now upon the other, according as the sun looks upon it. And Grammar has these two properties; since, on account of its infinity, the rays of reason do not terminate in it in any special part of its words; and it shines now on this side, and now on that, inasmuch as certain words, certain declinations, certain constructions, are in use which once were not, and many once were which will be again.”

For the influences of the Moon.