scrooge is being described here as a lonely person
personification
the word “solitary“ shows he is always seen by himself
"a frosty rime" - the weather is cold, scrooge doesn’t like the cold because he has no money to keep warm
“i am not the man I was” - this means that he regrets who he used to be
“I wear the chain i have forged” - this means that he is proud of his success but also that he feels guilty about what he did to bob cratchit
“i am not the man I was” - this means that he has changed from who he used to be
“I wear the chain i forged in life” - this means that his actions have consequences and they will follow him forever
“I will live in the past, present and future!” - Scrooge wants to change his life so he can have a better future
“you may be an undigested bit of beef, a blot of mustard or a crumb of cheese” - this means that he hasn’t eaten properly so he feels sick
“A merry Christmas to everybody! A happy New Year to all the world!” - Scrooge says this at the end of the story when he realises how much happier he could make people if he changed his ways.