A simile to describe Scrooge. His "sharp" tongue when it comes to others and his "hard" exterior.
Scrooge has harsh features to the point where he is almost inhuman.
The adjective "hard" may be a reference Scrooge's tough exterior and how he has no sign of kindness in his face and appearance.
The reader is positioned to feel negatively towards Scrooge as Dickens portrays him to be a highly cold character that we should interpret with caution.
Bob is incredibly kind-hearted towards his employer and manages to look past all the ways in which he mistreats him due to his gratefulness that Scrooge at least pays his wages. This emphasises the gratitude of the poor with any act of generosity given to them
"brave" conveys this idea that although her and her family are affected by poverty, she continues to hold this "brave" persona to keep her family strong and their spirits high.
"ribbons" we know are quite cheap, so this would be something the poor would probably have a tiny bit of access to. this also shows us that even though they are poor, Mrs Cratchit tries to take as much pride in her appearance as she can, implying that she is so desperate to lead a normal life and have access to the things that the wealthy do too.
Fezziwig is not dismissive and acknowledges his guests even those who are from lower classes and personally sends them off. He is kind-hearted and is a character that Dickens want the upper class to embody
This simile suggests he is shut up, tightly closed and will not be prised open except by force. However, an oyster might contain a pearl, so it also suggests there might be good buried deep inside him, underneath the hard, brittle shell.
Scrooge entered timidly, and hung his head before this spirit.
The verb 'timidly' contrasts with his confident rejection of the visitors at his office and the narrator clearly indicates that the change has started.