What happens when the Spirit sprinkles water from his torch? What is Dickens illustrating about Christmas with this metaphor?

When the Spirit sprinkles water from his torch he spreads happiness and even ends quarrels.

And it was a very uncommon kind of torch, for once or twice when there were angry words between some dinner-carriers who had jostled each other, he shed a few drops of water on them from it, and their good humour was restored directly. For they said, it was a shame to quarrel upon Christmas Day. And so it was. God love it, so it was.