In Stephen Crane's To the Maiden why does the sailor view the sea as dead grey walls on which is written the grim hatred of nature?

The sailor in "To the Maiden" views the sea as dead grey walls with a message of grim hatred because he is experiencing a sense of hopelessness and isolation. The ocean's vastness and indifference make him feel tiny and insignificant, leading to a perception of nature as hostile and unfeeling. This bleak outlook reflects the sailor's emotional state and sense of despair.