“Philolaus, with another stroke of genius, calls the angle of the tetragon that of Rhea, of Demeter, and of Hestia. For considering the earth as a tetragon, and noting that this element possesses the property of continuousness, as we learned from Timaeus, and that the earth receives all that drips from the divinities, and also the generative powers that they contain, he was right in consecrating the angle of the tetragon to these divinities which procreate life. Indeed, some of them call the earth Hestia and Demeter, and claim that it partakes of Rhea, in its entirety, and that Rhea contains all the begotten cause. That is why, in obscure language, he says that the angle of the tetragon contains the single power which produces the unity of these divine creations.”