“I could be counted upon to perform the mission they had assigned me, or, if that was unworkable, to improvise and turn my men's exertions upon a secondary undertaking as good as or better than the first.”

Source: Autobiography of Mark Twain, Vol. 3 (2015), p. 99

Address to Grand Jury (1885)
Variant: I believed that I had a mission, I believe that I had a mission at this very moment.
The Queen Vs. Louis Riel : Accused and Convicted of the Crime of High Treason. Report of Trial at Regina (1886), p. 147 http://books.google.com/books?id=jLANAAAAQAAJ&output=text
Context: It is true, gentlemen, I believed for years I had a mission, and when I speak of a mission you will understand me not as trying to play the role of insane before the grand jury so as to have a verdict of acquittal upon that ground. I believe that I have a mission, I believe I had a mission at this very time. What encourages me to speak to you with more confidence in all the imperfections of my English way of speaking, it is that I have yet and still that mission, and with the help of God, who is in this box with me, and He is on the side of my lawyers, even with the honorable court, the Crown and the jury, to help me, and to prove by the extraordinary help that there is a Providence to-day in my trial, as there was a Providence in the battles of the Saskatchewan.

John le Carré (1931-2020) on the Iraq War, Corporate Power, the Exploitation of Africa & More, Democracy Now! https://www.democracynow.org/2020/12/25/john_le_carre_1931_2020_on (25 December 2020)

In a sermon titled 'Our Condition' - "Indebted Ghanaian Saved From Prostitution By TB Joshua" http://www.theghanaianjournal.com/2009/08/04/indebted-ghanaian-saved-from-prostitution-by-tb-joshua/ The Ghanaian Journal (August 4 2009)

Valedictory, dated February 1837, Messenger and advocate 3, p. 548. (August 1837)
Cowdery’s 1837 editorial farewell in the Kirtland Church newspaper.

Order of the Day (2 June 1944), a message to troops before the Normandy landings http://www.3ad.com/history/wwll/feature.pages/d.day.letters.htm, reported in Franklin Watts, Voices of History (1945), p. 260
1940s
Context: Soldiers, Sailors and Airmen of the Allied Expeditionary Force!
You are about to embark upon the Great Crusade, toward which we have striven these many months. The eyes of the world are upon you. The hopes and prayers of liberty-loving people everywhere march with you. In company with our brave Allies and brothers-in-arms on other Fronts, you will bring about the destruction of the German war machine, the elimination of Nazi tyranny over the oppressed peoples of Europe, and security for ourselves in a free world.
Your task will not be an easy one. Your enemy is well trained, well equipped and battle hardened. He will fight savagely.
But this is the year 1944! Much has happened since the Nazi triumphs of 1940-41. The United Nations have inflicted upon the Germans great defeats, in open battle, man-to-man. Our air offensive has seriously reduced their strength in the air and their capacity to wage war on the ground. Our Home Fronts have given us an overwhelming superiority in weapons and munitions of war, and placed at our disposal great reserves of trained fighting men. The tide has turned! The free men of the world are marching together to Victory!
I have full confidence in your courage and devotion to duty and skill in battle.
We will accept nothing less than full Victory! Good luck! And let us beseech the blessing of Almighty God upon this great and noble undertaking.

" The Higher Life of American Cities http://www.theodore-roosevelt.com/images/research/treditorials/o151.pdf", in The Outlook (21 December 1895), p. 1083-1085
1890s

Source: A Clockwork Orange