We can draw the conclusion about the symbolism of the theme-the relationship between human and nature。 In the novel, the author tells the conflict between Ahab and Moby Dick。 At the end of the novel, we know the result of the conflict。 The conflict is destruction of both。 As far as he is concerned, the ideal way to deal with the conflict is that human should live in harmony with nature and make coexistence and interdependence on each other。 Ishmael witnesses the actions of Captain Ahab and crew on Pequod。 Moby Dick reveals that the relation between human and nature is coexisting and linked。 If human do not hurt whales to get whale oil, whales can live peacefully and happily in the sea and human won’t be assaulted by Moby Dick。 People won’t get tragic ending at the cost of lives。 Moby Dick was in no flurry just gliding quietly through the sea when it was attacked at the first time, which means that nature won’t hurt human unless human wants to destroy it。 In this theme, Melville uses the symbolism to show that the relationship between human and nature should be vividly and profound。