The power of church, state, school or public opinion, or of a monopoly of the instruments of communication, may be so used as to impoverish and imprison the mind. One idea insinuated into the mind may take possession of it and exercise a hypnotic spell. Two or more ideas are better, but if these are methodically selected to suit the purpose of an authority, they still deny freedom. Whoever determines what alternatives shall be made known to man controls what that man should choose from. He is deprived of freedom in proportion as he is denied access to any ideas, or is confined to any range of ideas short of the totality of relevant possibilities.