"At first people refuse to believe that a strange new thing can be done, then they begin to hope it can be done, then they see it can be done--then it is done and all the world wonders why it was not done centuries ago."

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Gaily bedight, A gallant knight, In sunshine and in shadow, Had journeyed long, Singing a song, In search of Eldorado. But he grew old— This knight so bold— And o’er his heart a shadow— Fell as he found No spot of ground That looked like Eldorado. And, as his strength Failed him at length, He met a pilgrim shadow— ‘Shadow,’ said he, ‘Where can it be— This land of Eldorado?’ ‘Over the Mountains Of the Moon, Down the Valley of the Shadow, Ride, boldly ride,’ The shade replied,— ‘If you seek for Eldorado!

— Edgar Allan Poe