Vigilance Quotes
Thomas Jefferson, Henry Augustine Washington (1859). “The Writings of Thomas Jefferson: Correspondence. Reports and opinions while secretary of state”, p.212
Doubt must be no more than vigilance, otherwise it can become dangerous.
"Aphorisms". Book by Georg Christoph Lichtenberg. Notebook F 53, 1799.
Marshall McLuhan (1964). “Understanding media: the extensions of man”
George Santayana, Martin A. Coleman (2009). “The Essential Santayana: Selected Writings”, p.537, Indiana University Press
William Jennings Bryan (1917). “Heart to Heart Appeals”
Miranda July (2011). “It Chooses You”, p.15, Canongate Books
Martha Gellhorn (2015). “The View From The Ground”, p.332, Granta Books