The child, unlike the adult, is not on his way to death. He is on his way to life. His work is to fashion a man in the fullness of his strength. By the time the adult exists, the child has vanished. So the whole life of the child is an advance toward perfection, toward a greater completeness. From this we may infer that the child will enjoy doing the work needed to complete himself. The child’s life is one in which work–the doing of one’s duty–begets joy and happiness. For adults, the daily round is more often depressing.
–Dr. Maria Montessori, The Absorbent Mind (page 30)