'Piteous My Rhyme' by Rossetti employs the extended metaphor of love as a burdensome, yet eternal, force - Throughout the poem, love is depicted as something that is given selflessly, often without return, symbolizing the emotional toll it takes on the individual - The metaphor extends to portray love as both a source of joy and pain, existing beyond the limits of time and mortality - By using this metaphor, Rossetti emphasizes the paradoxical nature of love - its capacity to endure and its ability to bring both fulfilment and suffering