Hamilton Wright Mabie,
Essays on Work and Culture
“ Play is the prelude to work, and stands in closest relation to it; it is the natural expression of the child's energy, as work is the natural expression of the man's energy. In play and through play the child develops the power that is in him, comes to knowledge of himself, and realises his relation with other children and with the world about him. In the free and unconscious pouring out of his vitality he secures for himself training, education, and growth.The two instincts which impel the child to play are the craving for activity and the craving for joy. ”
