Read it through once

But what most puzzled and confounded you was a long, limber, portentous, black mass of something hovering in the centre of the picture over three blue, dim, perpendicular lines floating in a nameless yeast. A boggy, soggy, squitchy picture truly, enough to drive a nervous man distracted. Yet was there a sort of indefinite, half-attained, unimaginable sublimity about it that fairly froze you to it, till you involuntarily took an oath with yourself to find out what that marvellous painting meant. Ever and anon a bright, but, alas, deceptive idea would dart you through.—It’s the Black Sea in a midnight gale.—It’s the unnatural combat of the four primal elements.—It’s a blasted heath.—It’s a Hyperborean winter scene.—It’s the breaking-up of the ice-bound stream of Time. But at last all these fancies yielded to that one portentous something in the picture’s midst. _That_ once found out, and all the rest were plain. But stop; does it not bear a faint resemblance to a gigantic fish? even the great leviathan himself?