Analysis of roll on thou deep dark blue ocean by byron

 the ocean, beginning "Roll on, thou deep and dark blue ocean—roll!," Byron contrasts its permanence, power, and freedom with vanished civilizations: "Thy shores are empires, changed in all save thee—/ Assyria, Greece, Rome, Carthage, what are they?" The ocean remains, "Dark-heaving;—boundless, endless, and sublime—/ The image of Eternity"