“I confess some part of me thought, If only I'd stuck around, this is the sort of catastrophe I might have created.”

Source: No Country for Old Men

When the Cathedrals Were White http://books.google.com/books?id=TzwVAAAAMAAJ&q="A+hundred+times+I+have+thought+New+York+is+a+catastrophe+and+fifty+times+it+is+a+beautiful+catastrophe"#search_anchor (1947)
Attributed from posthumous publications

The Last Song
Song lyrics, The One (1992)

1900s, The Moral Equivalent of War (1906)
Context: I will now confess my own utopia. I devoutly believe in the reign of peace and in the gradual advent of some sort of socialistic equilibrium. The fatalistic view of the war function is to me nonsense, for I know that war-making is due to definite motives and subject to prudential checks and reasonable criticisms, just like any other form of enterprise. And when whole nations are the armies, and the science of destruction vies in intellectual refinement with the science of production, I see that war becomes absurd and impossible from its own monstrosity. Extravagant ambitions will have to be replaced by reasonable claims, and nations must make common cause against them.

Source: Picture Perfect

Remarks to Theodor Wolff (5 February 1915), quoted in Konrad H. Jarauschl, ‘The Illusion of Limited War: Chancellor Bethmann Hollweg's Calculated Risk, July 1914’, Central European History, Vol. 2, No. 1 (Mar., 1969), p. 76

The Advocate interview (2005)