Give a brief answer to the following question in English.How do you understand the white whale, Moby Dick in Herman Melville’s Moby-Dick?
THE WHITE WHALE, MOBY DICK, SYMBOLIZES NATURE FOR MELVILLE, FOR IT IS COMPLEX, UNFATHOMABLE MALIGNANT, AND BEAUTIFUL AS WELL. FOR THE CHARACTER AHAB, HOWEVER, THE WHALE REPRESENTS ONLY EVIL. MOBY DICK, IS LIKE A WALL, HIDING SOME UNKNOWN, MYSTERIOUS THINGS BEHIND. FOR THE AUTHOR, AS WELL AS FOR THE READER AND ISHMAEL, THE NARRATOR, MOBY DICK IS STILL A MYSTERY, AN ULTIMATE MYSTERY OF THE UNIVERSE, INSCRUTABLE AND AMBIVALENT, AND THE VOYAGE OF THE MIND WILL FOREVER REMAIN A SEARCH, NOT A DISCOVERY, OF THE TRUTH. 
