the Heaven of the fixed stars are more full of power amongst
themselves in proportion as they are nearer to that circle.

And upon the back of this circle in the Heaven of Venus, of which I
now speak, is a little sphere, which revolves by itself in this
Heaven, the circle of which Astrologers call Epicycle; and as the
great sphere revolves about two poles, so does this little sphere: and
so has this little sphere the equatorial circle; and so much the more
noble it is in proportion as it is nearer to those: and in the arc, or
rather back, of this circle is fixed the most brilliant star of Venus.
And, although it may be said that there are ten Heavens according to
strict Truth, this number does not comprehend them all: for that of
which mention is made, the Epicycle, in which the star is fixed, is a
Heaven by itself, or rather sphere; and it has not one essence with
that which bears it, although it may be more like to it than to the
others, and with it is called one Heaven, and they name the one and
the other from the star. How the other Heavens and the other stars may
be is not for present discussion; let it suffice that the nature of
the third Heaven, with which I am at present concerned, has been told,
and concerning which all that is at present needful has been shown.




CHAPTER V.


Since it has been shown in the preceding chapter what this third
Heaven is, and how it is ordered in itself, it remains to show who
those are who move it. It is then to be known, in the first place,