" Let us suppose that I own a picture by one of the great artists, which, in any civilized community, is worth thousands of dollars. I take it to Baffin Ray, and by “salesmanship” induce an Eskimo to give a bundle of furs worth $500 for it. I have really wronged him, for he has no use for the picture; it has no use value to him; it will not add to his life.   But suppose I give him a gun worth $50 for his furs; then he has made a good bargain. He has use for the gun; it will get him many more furs and much food; it will add to his life in every way; it will make him rich.   "

― Wallace D. Wattles , The Science of Getting Rich