“If the principle is accepted that killing in defense of property and life is valid and mandatory, armed preparedness for war follows automatically.”

Individualism and Socialism (1933)

"Just a girl with a gun; not a gratuitous killer" http://praag.org/?p=11950, Praag.org, November 25, 2013.
2010s, 2013

What Does God Want Us to Do About Russia? (1948)

Now is the Time to Prevent a Third World War (1950)
Context: The imminence of the threat hovering over civilization requires Christians to disentangle themselves from the war system as completely and as rapidly as they can.... Every Christian has the power to support or to oppose preparedness to wage atomic war.... He can support or oppose the delegating of wider jurisdiction and greater authority to the United Nations Organization through limitations upon national sovereignty. He can support or oppose the policy of settling every conceivable controversy with another nation by pacific means only. He can support or oppose the effort to create the international mind and heart in place of extreme nationalism and narrow patriotism.... He can choose between the way of war and the way of Jesus.

“The Peerless Malevolence of Redcoat Piers Morgan”, http://www.ilanamercer.com/phprunner/public_article_list_view.php?editid1=692 WorldNetDaily.com, January 18, 2013.
2010s, 2013

Die dem Satz vom Grunde nachgehende ist die vernünftige Betrachtungsart, welche im praktischen Leben, wie in der Wissenschaft, allein gilt und hilft: die vom Inhalt jenes Satzes wegsehende ist die geniale Betrachtungsart, welche in der Kunst allein gilt und hilft.
Die Welt als Wille und Vorstellung, Zweiter Band, Ergänzungen zum dritten Buch, para. 36 (1859)
The World as Will and Representation (1819; 1844; 1859)

"The American Boy", published in St. Nicholas 27, no. 7 (May 1900), p. 574
1900s
Context: In short, in life, as in a football game, the principle to follow is: Hit the line hard; don't foul and don't shirk, but hit the line hard!

1910s, Address to the Knights of Columbus (1915)
Context: Therefore, we should devote ourselves as a preparative to preparedness, alike in peace and war, to secure the three elemental things: one, a common language, the English language; two, the increase in our social loyalty citizenship absolutely undivided, a citizenship which acknowledges no flag except the flag of the United States and which emphatically repudiates all duality of intention or national loyalty; and third, an intelligent and resolute effort for the removal of industrial and social unrest, an effort which shall aim equally at securing every man his rights and to make every man understand that unless he in good faith performs his duties he is not entitled to any rights at all.

Source: The Lost Symbol