It is irreverent to the Gods to give you this demonstration, but for your sakes it shall be done. - Iamblichus

Hence the Pythagoreans in their theology called it sometimes "universe," sometimes "heaven," sometimes "all," sometimes "Fate" and "eternity," "power" and "trust" and "Necessity," "Atlas" and "unwearying," and simply "God" and "Phanes" and "sun."
They called it "universe," because all things are arranged by it both in general and in particular, and because it is the most perfect boundary of number, in the sense that "decad" is, as it were, "receptacle," just as heaven is the receptacle of all things, they called it "heaven" and, among the Muses, "Ourania."

They call it "friendship" and "peace," and further "harmony" and "unanimity": for these are all cohesive and unificatory of opposites and dissimilars. Hence they also call it "marriage." And there are also three ages in life.

Furthermore, the monad produces itself and is produced from itself, since it is self-sufficient and has no power set over it and is everlasting; and it is evidently the cause of permanence, just as God is thought to be in the case of actual physical things, and to be the preserver and maintainer of natures.