
2010s, The American Art of Renewal (2018)
Source: The Guns of the South (1992), p. 5
2010s, The American Art of Renewal (2018)
Letter to Robert E. Lee (7 April 1865). https://www.facebook.com/SUVCW/posts/783255298389995
1860s
General Robert E. Lee, Part IV, CH 5: Longsteet, p.361
The Killer Angels (1974)
Source: The Monuments Men: Allied Heroes, Nazi Thieves, and the Greatest Treasure Hunt in History
Variant transcription from "Death of a Genius" in Life Magazine: "Certainly there are things worth believing. I believe in the brotherhood of man and the uniqueness of the individual. But if you ask me to prove what I believe, I can't. You know them to be true but you could spend a whole lifetime without being able to prove them. The mind can proceed only so far upon what it knows and can prove. There comes a point where the mind takes a leap—call it intuition or what you will—and comes out upon a higher plane of knowledge, but can never prove how it got there. All great discoveries have involved such a leap."
Unsourced variant: "The intellect has little to do on the road to discovery. There comes a leap in consciousness, call it intuition or what you will, and the solution comes to you and you do not know how or why. All great discoveries are made in this way." The earliest published version of this variant appears to be The Human Side of Scientists by Ralph Edward Oesper (1975), p. 58 http://books.google.com/books?id=-J0cAQAAIAAJ&q=%22solution+comes+to+you+and+you+do+not+know%22&dq=%22solution+comes+to+you+and+you+do+not+know%22&hl=en, but no source is provided, and the similarity to the "Life Magazine" quote above suggests it's likely a misquote.
Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 136
As quoted in Autobiography and Personal Reminiscences of Major-General Benj. F. Butler https://books.google.com/books?id=0LIBAAAAMAAJ&pg=PA604 (1892), pp. 604–605
To William Randolph Hearst. Quoted in "Ask Me Anything: Our Adventures with Khrushchev" - Page 152 - by William Randolph Hearst - 1960
Mr. Rosenberg, please accept my devotion, esteem and gratitude.
Quote from De Chirico's letter to Mr. Rosenberg, Rome, 13 Oct. 1925; from LETTERS BY GIORGIO DE CHIRICO TO LÉONCE ROSENBERG, 1925-1939 http://www.fondazionedechirico.org/wp-content/uploads/309-338-Rosenberg_Metaphysical_Art_ENG.pdf, p. 317
1920s and later