Nowadays, the whale-fishery furnishes an asylum for many romantic, melancholy, and absent-minded young men, disgusted with the carking cares of earth, and seeking sentiment in tar and blubber. Childe Harold not unfrequently perches himself upon the mast-head of some luckless disappointed whale-ship, and in moody phrase ejaculates:—

Roll on, thou deep and dark blue ocean, roll!

Ten thousand blubber-hunters sweep over thee in vain. 

Very often do the captains of such ships take those absent-minded young philosophers to task, upbraiding them with not feeling sufficient “interest” in the voyage; half-hinting that they are so hopelessly lost to all honorable ambition, as that in their secret souls they would rather not see whales than otherwise. But all in vain; those young Platonists have a notion that their vision is imperfect; they are short-sighted; what use, then, to strain the visual nerve? They have left their opera-glasses at home.

“Why, thou monkey,” said a harpooneer to one of these lads, “we’ve been cruising now hard upon three years, and thou hast not raised a whale yet. Whales are scarce as hen’s teeth whenever thou art up here.” Perhaps they were; or perhaps there might have been shoals of them in the far horizon; but lulled into such an opium-like listlessness of vacant, unconscious reverie is this absent-minded youth by the blending cadence of waves with thoughts, that at last he loses his identity; takes the mystic ocean at his feet for the visible image of that deep, blue, bottomless soul, pervading mankind and nature; and every strange, half-seen, gliding, beautiful thing that eludes him; every dimly-discovered, uprising fin of some undiscernible form, seems to him the embodiment of those elusive thoughts that only people the soul by continually flitting through it. In this enchanted mood, thy spirit ebbs away to whence it came; becomes diffused through time and space; like Cranmer’s sprinkled Pantheistic ashes, forming at last a part of every shore the round globe over.

There is no life in thee, now, except that rocking life imparted by a gently rolling ship; by her, borrowed from the sea; by the sea, from the inscrutable tides of God. But while this sleep, this dream is on ye, move your foot or hand an inch; slip your hold at all; and your identity comes back in horror. Over Descartian vortices you hover. And perhaps, at mid-day, in the fairest weather, with one half-throttled shriek you drop through that transparent air into the summer sea, no more to rise for ever. Heed it well, ye Pantheists! 

- Herman Melville, Moby Dick.