Bertolt Brecht: Because things are the way they are, things will not stay the way they are.

Source

From the book as quoted in Dictionary of Contemporary Quotations (1976) by John Gordon Burke and Ned Kehde, p. 224, also in The Book o, Bertolt Brecht, as quoted in Dictionary of Contemporary Quotations (1976) by John Gordon Burke and Ned Kehde, p. 224, also in The Book of Positive Quotations (2007) by John Cook, p. 390