This poem was originally called "Sun-Down Poem" (1856), and the present title was given it in 1860. It was substantially revised in 1881.
The major image in the poem is the ferry. It symbolizes continual movement, backward and forward, a universal motion in space and time. The ferry moves on, from a point of land, through water, to another point of land. Land and water thus form part of the symbolistic pattern of the poem. Land symbolizes the physical; water symbolizes the spiritual. The circular flow from the physical to the spiritual connotes the dual nature of the universe. Dualism, in philosophy, means that the world is ultimately composed of, or explicable in terms of, two basic entities, such as mind and matter. From a moral point of view, it means that there are two mutually antagonistic principles in the universe — good and evil. In Whitman's view, both the mind and the spirit are realities and matter is only a means which enables man to realize this truth. His world is dominated by a sense of good, and evil has a very subservient place in it. Man, in Whitman's world, while overcoming the duality of the universe, desires fusion with the spirit. In this attempt, man tries to transcend the boundaries of space and time.
The ferry symbolizes this spatial and temporal movement. It is also associated with the groups of men and women who ride it, who have ridden it, and who will ride it. The coming together of these men and women symbolizes the spiritual unity of men in this world.
The poet first addresses the elements — the tide, the clouds, and the sun — saying, "I see you face to face." He next observes the crowds of men and women on the ferryboats: "How curious you are to me" he says, for he thinks of these people in relation to those who "shall cross from shore to shore years hence." The poet meditates on the relationships between the various generations of men.
