Probably the last sentence..
a millionaire banker
Walter Mitty performs surgery on a millionaire banker. The fantasy starts with Mitty walking in on a situation where the other doctors are having a hard time with the patient's case. They ask Mitty to take a look at the millionaire. The fantasy ends when Mitty puts on the surgical gloves with the confidence of one who has already succeeded.
Answer:
To express that the author's 'Muse' (or inspiration) is gone
Explanation:
"Where art thou, Muse, that thou forget'st so long
To speak of that which gives thee all thy might?
Spend'st thou thy fury on some worthless song,
Darkening thy power to lend base subjects light?"
I can sorta guess that this is asking something like "Where are you Muse, did you forget about me for so long?"
No because that rude and just stop