What is the contrast described in this passage?

She crept along trembling with cold and hunger--a very picture of sorrow, the poor little thing!

The flakes of snow covered her long fair hair, which fell in beautiful curls around her neck; but of that, of course, she never once now thought. From all the windows the candles were gleaming, and it smelt so deliciously of roast goose, for you know it was New Year's Eve; yes, of that she thought.