O thou beautiful And unimaginable ether! and Ye multiplying masses of increased And still increasing lights! what are ye? what Is this blue wilderness of interminable Air, where ye roll along, as I have seen The leaves along the limpid streams of Eden? Is your course measur'd for ye? Or do ye Sweep on in your unbounded revelry Through an aerial universe of endless Expansion,--at which my soul aches to think,-- Intoxicated with eternity.