The purpose of the repetition is to intensify how the speaker does not want to receive criticism about his desires and the activities he does.
Explanation:
Repetition is the figure of language that allows a word to be repeated several times during a text, to intensify some textual element a meaning that the author is trying to convey.
We can see an example of repetition in the lines of the poem “Dear Friends” by Arlington, presented in the question above. The repetition is done through the use of the word "nor" where the speaker reinforces that he does not want to receive reprimands, criticisms or contrary opinions about what he wants to do and about what he does. It is likely that the speaker is referring to the criticism he receives for wanting to be a poet, but as this profession is his desire, he no longer wants to hear any contrary opinion about it.
