Enquiry Quotes
Frag. B 2.2-6, quoted by Proclus, "Commentary on the Timaeus I", 345,
Bridget Riley (2009). “The Eye's Mind: Collected Writings 1965-2009”
"A Preliminary Discourse on the Study of Natural Philosophy". Book by John Herschel, 1830.
Reason and free inquiry are the only effectual agents against error.
Thomas Jefferson, Richard Holland Johnston, Thomas Jefferson Memorial Association of the United States “The Writings of Thomas Jefferson”
"The Apology of Socrates" by Plato, 399 BC.
William Penn (1726). “A Collection of the Works of William Penn: To which is Prefixed a Journal of His Life, with Many Original Letters and Papers Not Before Published”, p.852
Albert Einstein (2011). “Out of My Later Years: The Scientist, Philosopher, and Man Portrayed Through His Own Words”, p.178, Open Road Media
Gerd Sommerhoff (1974). “Logic of the living brain”, John Wiley & Sons
Miguel de Unamuno (2012). “Tragic Sense of Life”, p.197, Courier Corporation
Patrick O'Brian (2000). “Blue at the Mizzen (Vol. Book 20) (Aubrey/Maturin Novels)”, p.121, W. W. Norton & Company
John Stuart Mill (1866). “Principles of Political Economy: With Some of Their Applications to Social Philosophy”, p.1