“Some men who are not real men love other things about themselves, but the real man believes that his honor is dearer than his life; and a nation is merely all of us put together, and the nation's honor is dearer than the nation's comfort and the nation's peace and the nation's life itself.”

Remarks at Amherst College (26 October 1963) http://millercenter.org/president/speeches/speech-3379
1963, Speech at Amherst College

"The Law of Civilization and Decay", The Forum (January 1897), reprinted in American Ideals (1926), vol. 13 of The Works of Theodore Roosevelt, national ed., chapter 15, pp. 259–60
1890s

For My Legionaries: The Iron Guard (1936), Nation and Culture

First Inaugural Address (4 March 1817)

Scaffold speech (1683)
Context: I am persuaded to believe that God had left nations to the liberty of setting up such governments as best pleased themselves, and that magistrates were set up for the good of nations, not nations for the honor and glory of magistrates. That the right and power of magistrates in every country was that which the laws of that country made it to be. That these laws are to be observed and the oaths taken by rulers to be kept. And that having the force of contracts between magistrates and people, they cannot be violated without danger of dissolving the whole fabric.

Letter from Paris to His Friend in Moscow (March 1st, 1849), Imperial Russia, A Sourcebook 1700-1917

1790s, Farewell Address (1796)

Foreword http://www.bartleby.com/55/100.html
1910s, Theodore Roosevelt — An Autobiography (1913)
Context: It seems to me that, for the nation as for the individual, what is most important is to insist on the vital need of combining certain sets of qualities, which separately are common enough, and, alas, useless enough. Practical efficiency is common, and lofty idealism not uncommon; it is the combination which is necessary, and the combination is rare. Love of peace is common among weak, short-sighted, timid, and lazy persons; and on the other hand courage is found among many men of evil temper and bad character. Neither quality shall by itself avail. Justice among the nations of mankind, and the uplifting of humanity, can be brought about only by those strong and daring men who with wisdom love peace, but who love righteousness more than peace.

Lament for Saul and Jonathan; reported in Hoyt's New Cyclopedia Of Practical Quotations (1922).