Final section - Dickens uses more similes to describe the changes of Scrooge ;
'I am as light as a feather' - got rid of restricting chains, 'feather' = freedom, flight, heaven (relates to Christianity) - 'angle'-goodness
'I am as happy as an angle'
'I am as merry as a school boy' - contrasts when we visited his past and saw how sad his school life was, might hint at what Scrooge longed for in his childhood