Utopias have their value -- nothing so wonderfully expands the imaginative horizons of human potentialities -- but as guides to conduct they can prove literally fatal.
Isaiah BerlinWhen a man speaks of the need for realism one may be sure that this is always the prelude to some bloody deed.
Isaiah BerlinThe desire not to be impinged upon, to be left to oneself, has been the markof high civilisation both on the part of individuals and communities.
Isaiah BerlinConformities are called for much more eagerly today than yesterday... skeptics, liberals, individuals with a taste for private life and their own inner standards of behavior, are objects of fear and derision and targets of persecution for either side... in the great ideological wars of our time.
Isaiah Berlin