Invoking the spirit of play -- Paradox, the essence of play therapy -- The roles of the therapist - -- Witnessing, containing, provoking, envisioning -- Synchrony and mirroring -- Imaginative play -- The meaning and necessity of symbol -- Symbols as vehicles of emotion -- Sand as vehicle for symbols -- Aggressive play -- The function and necessity of aggression -- Aggression and connection to selfonsters -- Aggression and connection to others -- Play materials that facilitate healthy aggression -- Helping things fall apart -- The mythological perspective -- The natural world as evidence.