This is, of course, a part of a famous sonnet by Elizabeth Barrett Browning. In this short excerpt, we can see a few literary devices. First, there is a rhetorical question. This is effective in making people think, even if the author is speaking to herself. It draws in the reader when done well. Second, there is a answer given in the second part of the excerpt. So, there responsive pattern to this poem, which can be seen a musical.