Answer:
Even as the poem “O Captain! My Captain!” celebrates the end of the American Civil War, it is also an elegy for President Abraham Lincoln. Victory and loss are thus closely intertwined throughout the poem. On the one hand, its mourning is tempered with joyful reminders that the war is won. Its celebrations, on the other hand, are haunted by melancholy. In this sense, Whitman’s poem illuminates the lingering pain and trauma of losses sustained in war—as well as the impossibility of ever separating the triumph of victory from its human costs.
In its juxtaposition of the language of loss and victory, “O Captain! My Captain!” uses poetic form to model the close relationship between triumph and pain. At first, it seems as if this will be a poem celebrating the victory of the Union in the Civil War. The speaker congratulates President Lincoln on steering the metaphorical ship of state through “every wrack,” i.e. storm, and declares that “the prize we sought is won.” However, halfway through this triumphant first stanza, the speaker breaks off: “But O heart! heart! heart! ... my Captain lies, / Fallen cold and dead.” The sudden appearance of a qualification—"But O heart!”—reveals to the reader that not all is well. The poem scarcely has time to celebrate triumph before facing loss.