I Don't Understand Your Question
A. the speakers doubts about herself
The following three lines indicate that all human beings are equal in the poet's eyes:
I am the poet of the woman the same as the man <em>(poet of both)</em>
And I say it is as great to be a woman as to be a man, (it is great to be both)
And I say there is nothing greater than the mother of men.
It is clear the use of comparisons of equality in the previous sentences from the poem of Walt Whitman.
Although these three eras differ at some point, they have one similar theme that is about supernatural events. Romanticism and Victorian era often exaggerate and puts more emphasize on this theme while Modernism tries to prove that no such event or things exist. It might not be the expressed the same way but does, it three eras consider this theme common.