Ocellus Lucanus on the nature of the universe

by Julius Firmicus Maternus; Proclus; Tauros

THEOREM 1.

Things which are naturally moved in a circle are simple.

Demonstration.—Let AB be that which is naturally moved in a circle. I say that AB is simple: for, since the motion in a circle is a simple motion; but every simple motion is the motion of a simple body; hence AB is a simple body. Things, therefore, which are naturally moved in a circle are simple.