“I die for my fatherland. I have a clear conscience. I only did my duty to my country when I tried to oppose the criminal folly of Hitler.”

To Colonel Theodor Pilling, Lieutenant Colonel Roger Michael, Major Winrich Behr in the evening of April 20, 1945. They tuned in the Wehrmacht receiver, and listened Joseph Goebbels's speech marking the Hitler's Birthday. Quoted in "Battle for the Ruhr" - Page 378 - by Derek S. Zumbro - 2006

Letter to the Louis D. Oaks, Los Angeles Chief of Police (17 May 1923)
Context: I intend to do what little one man can do to awaken the public conscience, and in the meantime I am not frightened by your menaces. I am not a giant physically; I shrink from pain and filth and vermin and foul air, like any other man of refinement; also, I freely admit, when I see a line of a hundred policeman with drawn revolvers flung across a street to keep anyone from coming onto private property to hear my feeble voice, I am somewhat disturbed in my nerves. But I have a conscience and a religious faith, and I know that our liberties were not won without suffering, and may be lost again through our cowardice. I intend to do my duty to my country.

Letter to Barack Obama (2013)

Enfim acabarei a vida e verão todos que fui tão afeiçoado à minha Pátria que não só me contentei de morrer nela, mas com ela.
Letter to Don Francisco de Almeyda, 1579; written after "the disaster of Alcácer-Kebir when the mad King Sebastião's mammoth invasion of Morocco ended in his death and the destruction or enslavement of all but one hundred of his army of over 20,000. [Camões] died on 10 June 1580, just before the throne passed to Philip II of Spain", as reported by Landeg White in The Lusiads (Oxford World's Classics, 2001), p. x; quoted as Camões' last words in The Yale Literary Magazine, Vol. VIII (January, 1843), No. 3, "Luis de Camoëns", p. 115.
Letters

Last words, 10/16/46. Quoted in "The Mammoth Book of Eyewitness World War II" - Page 564 - by Jon E. Lewis - History - 2002

Source: "Pledge during an oath-taking ceremony at the ordination hall of the Temple of the Emerald Buddha after his investiture as Crown Prince" https://www.bangkokpost.com/specials/royal-coronation/royal_speeches.php (28 July 1972)

Herscher, E. (1992, August 5). "'Brownie Mary' Is Cheered During Testimony at City Hall". San Francisco Chronicle, p. A1.

1970s, Remarks on pardoning Nixon (1974)
Context: My conscience tells me it is my duty, not merely to proclaim domestic tranquillity but to use every means that I have to insure it.
I do believe that the buck stops here, that I cannot rely upon public opinion polls to tell me what is right.
I do believe that right makes might and that if I am wrong, 10 angels swearing I was right would make no difference.
I do believe, with all my heart and mind and spirit, that I, not as President but as a humble servant of God, will receive justice without mercy if I fail to show mercy.
Finally, I feel that Richard Nixon and his loved ones have suffered enough and will continue to suffer, no matter what I do, no matter what we, as a great and good nation, can do together to make his goal of peace come true.