In "O Captain My Captain" by Whitman, The extended metaphor of the poem compares President Lincoln to a captain steering the "ship of state" which means guiding the union through the civil war.
Explanation:
An extended metaphor means; A metaphor that unfolds across multiple lines or paragraphs of a text, making use of multiple interrelated metaphors in an overarching one. The "captain' of the title however, becomes less essential to the progressive success and unity of the nation as it seemed in the beginning. because at first the "captain" (President Lincoln) is seen as entirely responsible for the safe return of the ship home.
But, the citizens continue to rejoice after their captain has fallen, they did not let the grief of the assassination on the president stop them from continuing their celebration as well as moving on with their lives.
It is true that people with good eyesight fail to see what is right in front of them. This is probably because they try to focus on distant objects and often ignore the things that come in their view before them.
