In the beginning Scrooge was not a nice man, he was greedy and often yelled at Bob, his employee. Christmas rolled around and Scrooge was even more upset, but can you blame him? His best friend and co-worker Marley died on Christmas 7 years ago.
Scrooge's old friend Marley appears as a ghost, he tells Scrooge about the spirits that are going to come and tell him about Christmas past, present,and future. This is to unsure Scrooge becomes a better man
The Ghost of Christmas Past appears and shows Scrooge his past and how lonely Scrooge was at a young age,Scrooge doesn't want to remember this because his sister died and he doesn't want to see her face.
Present shows Scrooge that Tim will die in the future. Future shows him the future and that Tim and Scrooge himself have passed. Present tells Scrooge that the only way to reverse this is to stop the looming shadows.
Thanks to the 3 spirits of Christmas, Scrooge became a better man and learned to embrace the Christmas spirit and never to forget Marley. He became like a second father to Tiny Tim.
Don't be greedy it can not only you but other people, your negativity can affect others.