The elves and the shoemaker

I read “The elves and the shoemaker”

This is the story about one very honest and earnest shoemaker. He lost everything what he had except the leather enough to make one pair of shoes. He cut it out for all ready to make up the next ready, prayed for heaven, and soon fell asleep. Next morning, he found there were two shoes on his table that made perfectly. This mysterious happening continued for a few days, so he finally decided to watch whole night with his wife; What happened, who it was that came and did it. As soon as it was midnight, there were came in two little naked dwarfs and made the shoes. When they saw that, his wife proposed to the shoemaker to make their cloths and little pair of shoes to tell thanks. They made those things, and gave them on another day. From that day they lived happily as long as they lived.

I thought those dwarfs will appear in front of honest and earnest person only. I want to see them someday