Then he talked to all the boys very seriously about cruelty, and said how hard-hearted and cowardly it was to hurt the weak and the helpless; but what stuck in my mind was this, he said that cruelty was the devil’s own trade-mark, and if we saw any one who took pleasure in cruelty we might know who he belonged to, for the devil was a murderer from the beginning, and a tormentor to the end.