The basic tool for the manipulation of reality is the manipulation of words. If you can control the meaning of words, you can control the people who must use the words.

Philip K. Dick (1928-1982) American writer

Speech (1978) “How To Build A Universe That Doesn’t Fall Apart Two Days Later”
    (Source)

First collected in Dick's I Hope I Shall Arrive Soon (1985) [ed. Mark Hurst and Paul Williams], where it serves as the introduction.

Lawrence Sutin, editor of The Shifting Realities of Philip K. Dick (1995) (where this is reprinted) suggests this speech was "likely never delivered."