Final answer:
The theme of Emily Dickinson's poem 'Hope Is the Thing with Feathers' is the resilience and omnipresence of hope, personified as a bird singing within the soul that endures through hardships and never asks for anything in return.
Step-by-step explanation:
The theme of Emily Dickinson's 'Hope Is the Thing with Feathers' revolves around the enduring nature of hope. Dickinson personifies hope as a bird that resides in the human soul, singing endlessly, especially during hard times. The message conveyed is that hope is a resilient force that sustains people through adversity without asking for anything in return. Dickinson employs metaphorical language to underline the comforting presence of hope, which is 'sweetest in the gale' and unshakeable even in the 'sorest storm.'