Denied the outlet, through play, of his energies, he recoiled upon himself and developed his mental processes. He became cunning; he had idle time in which to devote himself to thoughts of trickery.
Jack London...men, groping in the Arctic darkness, had found a yellow metal, and because steamship and transportation companies were booming the find, thousands of men were rushing into the Northland. These men wanted dogs, and the dogs they wanted were heavy dogs, with strong muscles by which to toil, and furry coats to protect them from the frost.
Jack London