The themes of the stories about Jimmy Valentine and Della and Jim are similar because they talk about unconditional love for one another.
This refers to the central message of a text that the author wants to convey to his readers.
Hence, we can see that based on the knowledge of Della and Jim, they gave up their most prized possession to get each other a gift and this is also echoed by Jimmy Valentine to show unconditional love.
Read more about Jim and Della here:
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