What quotes in A Christmas Carol shows that Scrooge has changed?

At the end of the book, after his encounters with the three Christmas ghosts, Scrooge wakes up in his own bedroom on Christmas morning a very different man from the greedy miser who, the evening before, hated the world, begrudged his clerk Christmas Day off, and wished the poor would die and rid the world of their excess population. Instead, he is overjoyed to be alive. He is in love with the world. One quote that expresses this is the following:

I am as light as a feather, I am as happy as an angel, I am as merry as a schoolboy. I am as giddy as a drunken man. A merry Christmas to everybody! A happy New Year to all the world. Hallo here! Whoop! Hallo!

Further, when he looks out the window, everything he sees seems bright and wonderful to him, showing he has gone from miserable to joyous:

Golden sunlight; Heavenly sky; sweet fresh air; merry bells. Oh, glorious! Glorious!

He also laughs, "Ha ha ha!” We are told he hasn't laughed in a long time and is out of practice but nevertheless offers a "brilliant" laugh.
Showing that he has changed completely from a humorless man who begrudged Bob Cratchit a day off, he now decides to surprise Cratchit with a giant turkey as a surprise, anonymous gift and feels it will be a great joke:

“I’ll send it to Bob Cratchit’s!” whispered Scrooge, rubbing his hands, and splitting with a laugh. “He sha’n’t know who sends it. It’s twice the size of Tiny Tim. Joe Miller never made such a joke as sending it to Bob’s will be!”

Finally, we learn that his changed personality lasts the rest of his life:

He became as good a friend, as good a master, and as good a man, as the good old city knew, or any other good old city, town, or borough, in the good old world.