Scrooge is represented as being incredibly cold, both emotionally and physically. The narrator says that he is
Hard and sharp as flint, from which no steel had ever struck out generous fire . . . . The cold within him froze his old features, nipped his pointed nose, shrivelled his cheek, stiffened his gait . . . .
Scrooge is likewise unfeeling and utterly lacking in compassion: someone we'd certainly describe as "cold." However, Fred, Scrooge's nephew, is represented as being warm, both emotionally and physically. When he walks into Scrooge's counting house, the narrator says,
He had so heated himself with rapid walking in the fog and frost, this nephew of Scrooge's, that he was all in a glow; his face was ruddy and handsome; his eyes sparkled, and his breath smoked again.
Where Scrooge is cold-hearted and callous, Fred is warm and kind....
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