Need online help Moby-Dick: Early in the voyage, Ahab tells Starbuck

Early in the voyage, Ahab tells Starbuck: “Talk not to me of blasphemy, man. I’d strike the sun if it insulted me. Who’s over me?” But before the final battle with the whale he claims that “This whole act’s immutably decreed… I am the Fates’ lieutenant; I act under orders.” Is Ahab guilty of a kind of Promethean hubris or is he tragically fated to do what he does? Are these positions contradictory?