Originally Posted by
mayneverhave
The whale is not God because the presence of a god implies a sort of divinity or divine plan in man's place in the universe. The great calamity of the 19th century is what the world would be like without a god to stabilize it - Moby-Dick, and the absolute neutrality of his color is a symbol for nature at its purest, which is completely disinterested in the affairs of man or man's place.
Ahab's rebellion is not against God, then, but against nature, which is, of course, noble and perhaps heroic, but logically impossible because man is a part of nature, and therefore cannot hope to rebel or rise above it.