The Ghost of Christmas past arrives with a flash of light which is symbolises a sudden warning for Scrooge. Light also has connotations of redemption, so this could foreshadow a change in Scrooge's behaviour.
Unearthly visitor
The Ghost of Christmas Past is described as not of the earth and is therefore frightening to Scrooge
It was a strange figure - like a child: yet not so like a child
The Ghost of Christmas Past is constantly changing and adapting. This suggests that the ghost isn't a fixed entity and that in order to enact change in Scrooge lots of different visions will need to occur.
From the crown of its head there sprung a bright clear jet of light
Light symbolises redemption and purity so it is clear that this ghost has arrived with good purposes.
Its belt sparkled and glittered
The connotations of sparkled and glittered are celebratory so perhaps, at its core, the ghost is here to bring joy to Scrooge's life
