The Wite Man's burden is a poem written by Rudyard Kipling and it talks about the war between the USA and Philippines. In the poem, the speakers repeats the same line at the beginning of every stanza because he wants to create an atmosphere related to the burden, indicating that it is always there by using the rhetorical device called anaphora, which consists in repeating the same line at the begining of every stanza. Another intention might be to get closer to the "white man".
About the last stanza, the first line ends with and exclamation mark, adding emphasis to the command.
