In the midst of all dwells the sun.

We regard it as a certainty that the earth, enclosed between poles, is bounded by a spherical surface.

At rest, however, in the middle of everything is the sun.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

In the center of all rests the sun. For who would place this lamp of a very beautiful temple in another or better place that this wherefrom it can illuminate everything at the same time? As a matter of fact, not unhappily do some call it the lantern; others, the mind and still others, the pilot of the world. Trismegistus calls it a "visible God"; Sophocles' Electra, "that which gazes upon all things." And so the sun, as if resting on a kingly throne, governs the family of stars which wheel around.

More stars in the north are seen not to set, while in the south certain stars are no longer seen to rise.

I shall now recall to mind that the motion of the heavenly bodies is circular, since the motion appropriate to a sphere is rotation in a circle.