Imagine standing at the edge of an immense ocean, and suddenly it splits open, revealing not land but another ocean beyond it—and that one, too, is only a prelude to a third, and so on. Dickinson’s speaker is caught in a kind of vertigo, realizing that what we take for the ultimate boundary might just be a doorway. Each sea becomes the verge of the next, a forever-receding edge that makes a mockery of final shores. The feeling is at once exhilarating and unnerving: a quiet, widening awe mixed with the humble shock of discovering that our deepest certainties (“the Three”) are mere guesses. There’s no comfort of arrival, just an endless horizon. The mood is luminous but dizzying, as if you’ve glimpsed not a single eternity but an unbroken string of them, each one passing you onward into more.
As if the Sea should part — Summary
As if the Sea should part And show a further Sea -- And that -- a further -- and the Three But a presumption be --
Of Periods of Seas -- Unvisited of Shores -- Themselves the Verge of Seas to be -- Eternity -- is Those --