"Exploitation and manipulation produce boredom and triviality; they cripple man, and all factors that make man into a psychic cripple turn him also into a sadist or a destroyer. This position will be characterized by some as "overoptimistic," "utopian," or "unrealistic." In order to appreciate the merits of such criticism a discussion of the ambiguity of hope and the nature of optimism and pessimism seems called for."