Moby Dick by Herman Melville Chapter 16 Page 20

Nor will it at all detract from him, dramatically regarded, if either by birth or other circumstances, he have what seems a half wilful overruling morbidness at the bottom of his nature. For all men tragically great are made so through a certain morbidness. Be sure of this, O young ambition, all mortal greatness is but disease. But, as yet we have not to do with such an one, but with quite another; and still a man, who, if indeed peculiar, it only results again from another phase of the Quaker, modified by individual circumstances.

Like Captain Peleg, Captain Bildad was a well-to-do, retired whaleman.

But unlike Captain Peleg — who cared not a rush for what are called serious things, and indeed deemed those self-same serious things the veriest of all trifles — Captain Bildad