The peddler was amused at the idea of the world being a rattrap, as the world had never accepted him. Everyone had always been unkind to him. He was amused with the idea because he himself had never led a good life, and envied others who led a better life than him. He thought that others got entrapped whereas he was not lured by the temptations and was free from them. It gave him joy to think ill of the world in this way.