What is the main conflict in The Chambered Nautilus by Oliver Wendell Holmes?

This is a poem. Its subject is the nautilus, a sea creature that lives inside a spiral shell. As it grows, the nautilus makes new, larger chambers of its shell in which to live, closing off the old chambers and gradually forming a spiral. Holmes compares the nautilus to a “ship of pearl” sailing through enchanted but dangerous waters until it is wrecked. The speaker or narrator of the poem uses the nautilus as a metaphor for the human soul, stressing that its example provides a “heavenly message” of how people should grow and develop through their lives. At the end of the poem, Holmes emphasizes the idea that humans expand their horizons until they achieve the spiritual freedom of heaven or the afterlife.