Insects have appeared in literature from classical times to the present day, an aspect of their role in culture more generally. Insects represent both positive qualities like cooperation and hard work, and negative ones like greed. Among the positive qualities, ants and bees represent industry and cooperation from the Book of Proverbs and Aesop's fables to tales by Beatrix Potter. Insects including the dragonfly have symbolised harmony with nature, while the butterfly has represented happiness in springtime in Japanese Haiku, as well as the soul of a person who has died.