“But if, through division in the ranks of those opposed to Mr. Lincoln, he should be elected, we have no excuse for dissolving the Union. The Union is worth more than Mr. Lincoln, and if the battle is to be fought for the Constitution, let us fight it in the Union and for the sake of the Union. With a majority of the people in favor of the Constitution, shall we desert the Government and leave it in the hands of the minority? A new obligation will be imposed upon us, to guard the Constitution and to see that no infraction of it is attempted or permitted. If Mr. Lincoln administers the Government in accordance with the Constitution, our rights must be respected. If he does not, the Constitution has provided a remedy.”

Diary entry (1820), as quoted in The Diary of John Quincy Adams (1951), by John Quincy Adams, Scribner's Sons, New York, p. 228-229 http://web.archive.org/web/20130703084250/http://home.nas.com/lopresti/ps6.htm

2010s, Suicide of a Superpower (2011)

Message regarding the unification of Germany http://millercenter.org/president/grant/speeches/message-regarding-unification-of-germany (7 February 1871)
1870s

2000s, God Bless America (2008), Slavery and the American Cause

Address By Dr. Shanker Dayal Sharma President Of India On The Occasion Of The 50th Anniversary Of The First Sitting Of The Constituent Assembly

1880s, Speech to the 'Boys in Blue' (1880)
Context: And it did gentle the condition and elevate the heart of every worthy soldier who fought for the Union, [applause, ] and he shall be our brother forevermore. Another thing we will remember: we will remember our allies who fought with us. Soon after the great struggle began, we looked behind the army of white rebels, and saw 4,000,000 of black people condemned to toil as slaves for our enemies; and we found that the hearts of these 4,000,000 were God-inspired with the spirit of Liberty, and that they were all our friends. [Applause. ] We have seen the white men betray the flag and fight to kill the Union; but in all that long, dreary war we never saw a traitor in a black skin. [Great cheers. ] Our comrades escaping from the starvation of prison, fleeing to our lines by the light of the North star, never feared to enter the black man's cabin and ask for bread. ["Good, good," "That's so," and loud cheers. ] In all that period of suffering and danger, no Union soldier was ever betrayed by a black man or woman. [Applause. ] And now that we have made them free, so long as we live we will stand by these black allies. [Renewed applause. ] We will stand by them until the sun of liberty, fixed in the firmament of our Constitution, shall shine with equal ray upon every man, black or white, throughout the Union. [Cheers. ] Fellow-citizens, fellow-soldiers, in this there is the beneficence of eternal justice, and by it we will stand forever. [Great applause. ] A poet has said that in individual life we rise, "On stepping-stones of our dead selves to higher things," and the Republic rises on the glorious achievements of its dead and living heroes to a higher and nobler national life. [Applause. ] We must stand guard over our past as soldiers, and over our country as the common heritage of all. [Applause. ]

From his speech given on 28 November 1960 at laying the foundation-stone of the building of the Law Institute of India, in: p. 15
Presidents of India, 1950-2003

1910s, Address to the Knights of Columbus (1915)
Context: One of the most important things to secure for him is the right to hold and to express the religious views that best meet his own soul needs. Any political movement directed against anybody of our fellow- citizens because of their religious creed is a grave offense against American principles and American institutions. It is a wicked thing either to support or to oppose a man because of the creed he professes. This applies to Jew and Gentile, to Catholic and Protestant, and to the man who would be regarded as unorthodox by all of them alike. Political movements directed against men because of their religious belief, and intended to prevent men of that creed from holding office, have never accomplished anything but harm. This was true in the days of the ‘Know-Nothing’ and Native-American parties in the middle of the last century; and it is just as true to-day. Such a movement directly contravenes the spirit of the Constitution itself. Washington and his associates believed that it was essential to the existence of this Republic that there should never be any union of Church and State; and such union is partially accomplished wherever a given creed is aided by the State or when any public servant is elected or defeated because of his creed. The Constitution explicitly forbids the requiring of any religious test as a qualification for holding office. To impose such a test by popular vote is as bad as to impose it by law. To vote either for or against a man because of his creed is to impose upon him a religious test and is a clear violation of the spirit of the Constitution.

1930s, Address at the Dedication of the Memorial on the Gettysburg Battlefield (1938)
Context: Lincoln spoke in solace for all who fought upon this field; and the years have laid their balm upon their wounds. Men who wore the blue and men who wore the gray are here together, a fragment spared by time. They are brought here by the memories of old divided loyalties, but they meet here in united loyalty to a united cause which the unfolding years have made it easier to see. All of them we honor, not asking under which flag they fought then — thankful that they stand together under one flag now. Lincoln was commander-in-chief in this old battle; he wanted above all things to be commander-in-chief of the new peace. He understood that battle there must be; that when a challenge to constituted government is thrown down, the people must in self-defense take it up; that the fight must be fought through to a decision so clear that it is accepted as being beyond recall.