Then mounted, next, the base of sun and moon,

'Twixt earth and ether, in the midway air

Rolling their orbs; for into neither these

Could blend harmonious, since too light with earth

To sink deprest, while yet too ponderous far

To fly with ether toward the realms extreme:

So 'twixt the two they hovered; vital there

Moving forever, parts of the vast whole;

As move forever in the frame of man

Some active organs, while some oft repose. [802]