Leo Tolstoi

“ You have well earned your crust. Tell me," said he, "how did you make this drink? I suppose you first of all mixed some fox's blood to make the muzhiks fox-like; after that some wolf's blood to make them wolf-like; and, last of all, it is quite plain that you added swine's blood to make them like veritable swine."
"No," replied the little demon, "it was not so. All I did was to give the miuzhik more corn than he knew what to do with. Bestial blood is present in every man, but so long as the man has barely enough bread to nourish him, it has no outlet. ”

“ Why, then, there will be nothing more for us to live for! We cannot let the matter rest where it is. Be off, and earn the muzhik's crust. If you don't get the upper hand of this muzhik in three years, I'll douch you in holy water."
Terrified at the holy water, the little demon fell to thinking how he should earn his crust. He thought and thought, and thought again. At last he assumed the form of a good Christian man, and took service with the poor muzhik as a labourer. And he taught the muzhik in the dry season to sow grain in the marshes. ”

“ When he's like that, he does not even grieve over his last crust. But let him only have food over and above his needs, and he will at once begin thinking of enjoying himself. Now I taught him an enjoyment — drunkenness. And whenever he turns the gift of God into spirits for his enjoyment, the fox-blood, the wolf-blood, and the swine-blood within him rise at once to the surface. Henceforth a beast will he become every time he touches spirit."
And the chief of the devils commended the little demon, granted him his crust of bread, and raised him high in his service. ”