Horatio Nelson: Doing

“Now I can do no more. We must trust to the Great Disposer of all Events and the Justice of our Cause. I thank God for this great opportunity of doing my Duty.”

Horatio Nelson

In response to the cheer that was raised after he sent the signal "England expects every Man will do his Duty.", as quoted in The Life of Admiral Lord Nelson, K.B. from His Lordship's Manuscripts (1810) by James Stanier Clarke and John McArthur, p. 667
The Battle of Trafalgar (1805)

God , Justice

“England expects every Man will do his Duty.”

Horatio Nelson

Famous signal to the British fleet before the battle of Trafalgar, as quoted in Life of Nelson, Ch. 9; Initially dictated as: "England confides that every man shall do his duty." The signaller pointed out that "expects" was in the signals alphabet, but "confides" was not and so had to be spelt out, taking longer, and Nelson agreed to the change.
Variant:
England expects every officer and man to do his duty this day.
As reported in The London Times (26 December 1805)
The Battle of Trafalgar (1805)

“To leave off action"? Well, damn me if I do! You know, Foley, I have only one eye,— I have a right to be blind sometimes . . . I really do not see the signal!”

Horatio Nelson

At the battle of Copenhagen, Ignoring Admiral Parker's signal to retreat, holding his telescope up to his blind eye, and proceeding to victory against the Danish fleet. (2 April 1801); as quoted in Life of Nelson, Ch. 7
1800s
Context: To leave off action"? Well, damn me if I do! You know, Foley, I have only one eye,— I have a right to be blind sometimes... I really do not see the signal!

“When I am without orders and unexpected occurrences arrive I shall always act as I think the honour and glory of my King and Country demand. But in case signals can neither be seen or perfectly understood, no captain can do very wrong if he places his ship alongside that of the enemy.”

Horatio Nelson

citation needed
The Battle of Trafalgar (1805)

Thinking , Country

“There are three things, young gentlemen, which you are constantly to bear in mind. Firstly, you must always implicitly obey orders, without attempting to form any opinion of your own respecting their propriety. Secondly, you must consider every man your enemy who speaks ill of your king; and thirdly, you must hate a Frenchman, as you do the devil.”

Horatio Nelson

Nelson's advice to his Midshipmen (1793), as quoted in Memoirs of the Life of Vice-Admiral Lord Viscount Nelson K.B. (1849), edited by Thomas Joseph Pettigrew, Vol. 2, p. 580
1790s

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