“David, the man after God’s own heart, got right to it and spilled out his guts about his experience: “How long, O LORD? Will You forget me forever?””

From a letter published in The Merry Heart : Reflections on Reading Writing, and the World of Books (1996).
Context: To ask an author who hopes to be a serious writer if his work is autobiographical is like asking a spider where he buys his thread. The spider gets his thread right out of his own guts, and that is where the author gets his writing.

Toutes les guerres sont civiles; car c'est toujours l'homme contre l'homme qui répand son propre sang, qui déchire ses propres entrailles.
Dialogues des morts, ch. 17, cited from De l'éducation des filles, Dialogues des morts et opuscules divers (Paris: Firmin Didot, 1857) p. 149; translation from Mr. Elphingston (trans.) Dialogues of the Dead, Together with Some Fable Composed for the Education of a Prince (Glasgow: Robert and Andrew Foulis, 1754) vol. 1, p. 87. (1700).

Source: The No. 1 Ladies' Detective Agency

Source: The War Hound and the World's Pain (1981), Chapter 18 (p. 168)

Prayer before the Battle of Edgehill (1642), quoted by Sir Philip Warwick, Memoires, 1701.
Source: * Hastings ** Max ** 1986 ** The Oxford Book of Military Anecdotes ** Oxford University Press ** United States ** 78-0-19-520528-2 ** 118 https://books.google.com/books?id=1_fwo9-URNEC&pg=PA118 citing C.V. Wedgwood

Saying 53
Context: A brother asked Abba Poemen, "How should a man behave?". The old man said to him, "Look at Daniel: no-one found anything in him to complain about except for his prayers to the Lord his God."

Quoted by Ron Grossman, "Nelson Algren's Chicago" http://www.chicagotribune.com/news/opinion/commentary/ct-nelson-algren-flashback-chicago-authors-perspec-0326-jm-20170324-story.html, The Chicago Tribune, March 25, 2017.
Nonfiction works

Source: The Mind of the Maker

Source: Awakened