memory and reflection

"Would you (Scrooge) so soon put out the light I give?"

using the metaphor of light to represent the Ghost's ability to illuminate Scrooge's past, suggests that the Ghost is there to help Scrooge understand and reflect on his past actions and choices, potentially illuminating areas where things have gone wrong. 

"For as its belt sparkled and glittered now in one part and now in another, and what was light one instant, at another time was dark."

highlights the fleeting and changeable nature of memory, suggesting that what was once clear and bright can fade or become obscure, just as the Ghost's appearance itself wavers

"These are but shadows of the things that have been," said the Ghost. "They have no consciousness of us."

further reinforces the idea that the memories are mere shadows, lacking independent existence or consciousness, and are presented to Scrooge for his contemplation

"I will honor Christmas in my heart, and try to keep it all the year"

Scrooge, said after his experience with the Ghost, demonstrates how the memories of his past Christmases have inspired him to change his ways and become a better person, showcasing memory as a catalyst for transformatio

"I told you these were shadows of the things that have been, that they are what they are, do not blame me!"

explicitly states the nature of the Ghost's visions as reflections of the past, emphasizing that they are not reality, but rather echoes of events