Status Updates From A Christmas Carol: Annotate...

...while there is infection in disease and sorrow, there is nothing in the world so irresistibly contagious as laughter and good-humour.

Best and happiest of all, the Time before him was his own, to make amends in!

Dickens shows that if someone is going to change and become a better person, they first have to see that there is something about themself that needs changing.