Paul Klee (1879–1940) German Swiss painter
Diary entry (December 1904), # 583, in The Diaries of Paul Klee, 1898-1918; University of California Press, 1968
1903 - 1910
" Beware!" ("Mise en garde!") http://web.mit.edu/allanmc/www/buren1.pdf, in Konzeption/Conception, translated by Charles Harrison and Peter Townsend (Leverkusen: Stadtischer Museum, 1969. <br class="br">1960s
Paul Klee (1879–1940) German Swiss painter
Diary entry (December 1904), # 583, in The Diaries of Paul Klee, 1898-1918; University of California Press, 1968
1903 - 1910
Frederick Douglass (1818–1895) American social reformer, orator, writer and statesman
1890s, Speech at Tremont Temple (1890)
Václav Havel (1936–2011) playwright, essayist, poet, dissident and 1st President of the Czech Republic
Letter to the downthrown Czechoslovak Communist Party chairman Alexander Dubček (August 1969), as translated in Disturbing the Peace (1986), Ch. 5 : The Politics of Hope, p. 115
Filippo Tommaso Marinetti (1876–1944) Italian poet and editor, founder of the Futurist movement
In the 'First Futurist Manifesto,' Filippo Marinetti, 1909; as quoted in Critical Writings: Filippo Tommaso Marinetti, New Edition, quoted in the text on the Back Cover, Macmillan, 7 Apr 2007
1900's
Daniel Buren (1938) sculptor from France
Daniel Buren (1979), cited in: A. A. Bronson, Peggy Gale, Art Metropole (1983). Museums by artists. p. 73
1970s
Benjamin Harrison (1833–1901) American politician, 23rd President of the United States (in office from 1889 to 1893)
First State of the Union Address (1889)
Leszek Kolakowski (1927–2009) Philosopher, historian of ideas
"Totalitarianism and the Virtue of the Lie", as quoted in Is God Happy? Selected Essays (2013), Basic Books, p. 57
“Politeness is the art of choosing among one's real thoughts.”
Abel Stevens (1815–1897) American Methodist clergy
Madame de Staël http://books.google.com/books?id=i4wBAAAAQAAJ&q=%22Politeness+is+the+art+of+choosing+among+one%27s+real+thoughts%22&pg=PA79#v=onepage (1881)
Elizabeth May (1954) Canadian politician
Source: Losing Confidence - Power, politics, And The Crisis In Canadian Democracy (2009), Chapter 5, Police State?, p. 124