“A believer is similar to a restless soldier in an endless battle.”

Source: What I Saw At Shiloh (1881), I

O’Connell recalling the spirited conduct of the Irish soldiers in Wellington’s army, at the Monster meeting held at Mullaghmast. Envoi, Taking Leave of Roy Foster, by Brendan Clifford and Julianne Herlihy, Aubane Historical Society, Cork.pg 16

Henry Miller on Writing (1964)

As quoted in The Cynic's Lexicon : A Dictionary of Amoral Advice (1984) by Jonathon Green
Variant translation: The Wedding March always reminds me of the music played when soldiers go into battle.
As quoted in The Routledge Dictionary of Quotations (1987) by Robert Andrews, p. 281

Source: Calculated Risk (1950), p. 1
Context: A soldier's life in combat is an endless series of decisions that mean success or failure, and perhaps life or death for himself or his comrades. The rifleman crawling through the rubble of a bombed-out street must decide on the best moment to escape enemy fire as he dodges from one doorway to the next. He must take a chance. The general seeking to break an enemy defense line and destroy his forces must decide just when and how to strike and precisely to what extent he dare weaken one sector of his front in order to mass overpowering strength at the main point of attack. He, too, must take a chance, although, in the stilted phraseology of military communiqués, he calls it a "calculated risk".

Source: Vorkosigan Saga, Falling Free (1988), Chapter 8 (p. 143)

From a speech (1933)