“We come humbly to say to the men in the forefront of our government that the civil rights issue is not an Ephemeral, evanescent domestic issue that can be kicked about by reactionary guardians of the status quo; it is rather an eternal moral issue which may well determine the destiny of our nation in the ideological struggle with communism. The hour is late. The clock of destiny is ticking out. We must act now, before it is too late.”

Wellesley Commencement Address (1994)

1960s, The American Promise (1965)

Commenting on Henry Ford's currency plan in ”Ford sees wealth in Muscle Shoals”, New York Times (6 December 1921), p. 6 http://select.nytimes.com/gst/abstract.html?res=F30E11F63B5A1B7A93C4A91789D95F458285F9.
Context: If our nation can issue a dollar bond, it can issue a dollar bill. The element that makes the bond good, makes the bill good, also. The difference between the bond and the bill is the bond lets money brokers collect twice the amount of the bond and an additional 20%, whereas the currency pays nobody but those who contribute directly in some useful way. … It is absurd to say our country can issue $30 million in bonds and not $30 million in currency. Both are promises to pay, but one promise fattens the usurers and the other helps the people.

Address to the Democratic National Convention http://www.americanrhetoric.com/speeches/huberthumphey1948dnc.html (July 14, 1948), Convention Hall, Philadelphia.

Letter to Major R.M. Sawyer https://books.google.com/books?id=KZAtAAAAIAAJ&pg=PA280&lpg=PA280&dq=%22If+they+want+eternal+war%22&source=bl&ots=hqqkcQXgYR&sig=op8FljMWJcliz6HsZRrfGO9ShJs&hl=en&sa=X&ved=0ahUKEwjx38jz5KrKAhVHMz4KHbleCckQ6AEIIjAB#v=onepage&q=%22If%20they%20want%20eternal%20war%22&f=false (31 January 1864), from Vicksburg.
1860s, 1864, Letter to R.M. Sawyer (January 1864)
Context: p>If they want eternal war, well and good; we accept the issue, and will dispossess them and put our friends in their place. I know thousands and millions of good people who at simple notice would come to North Alabama and accept the elegant houses and plantations there. If the people of Huntsville think different, let them persist in war three years longer, and then they will not be consulted. Three years ago by a little reflection and patience they could have had a hundred years of peace and prosperity, but they preferred war; very well. Last year they could have saved their slaves, but now it is too late.All the powers of earth cannot restore to them their slaves, any more than their dead grandfathers. Next year their lands will be taken, for in war we can take them, and rightfully, too, and in another year they may beg in vain for their lives. A people who will persevere in war beyond a certain limit ought to know the consequences. Many, many peoples with less pertinacity have been wiped out of national existence.</p

1960s, The American Promise (1965)
Context: There is no Constitutional issue here. The command of the Constitution is plain. There is no moral issue. It is wrong—deadly wrong&ndash; to deny any of your fellow Americans the right to vote in this country. There is no issue of States' rights or National rights. There is only the struggle for human rights.

Speech in Leeds against Irish Home Rule (18 June 1886), quoted in The Times (19 June 1886), p. 12
1880s

Nobel Peace Prize acceptance (1985)