“I am leaving. I did all I could”
1990s, Farewell speech (1999)
Context: Today it's important for me to tell you. The pain of each of you has called forth pain in me, in my heart. Sleepless nights, tormenting worries — about what needed to be done, so that people could live more easily and better. I did not have any more important task.
I am leaving. I did all I could — not according to my health, but on the basis of all the problems. A new generation is relieving me, a generation of those who can do more and better.
In accordance with the constitution, as I resign, I have signed a decree placing the duties of the president of Russia on the head of government, Vladimir Vladimirovich Putin. For three months, again in accordance with the constitution, he will be the head of state. And in three months, presidential elections will take place.
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Boris Yeltsin 28
1st President of Russia and Chairman of the Supreme Soviet … 1931–2007Related quotes

“No. If I am in such a temper, than the person I am in a temper with needs to leave.”
as an answer to the question: Have you ever walked of a set, in a temper?
On the Sets, at 0 Min 19 Sec https://www.youtube.com/watch?v=3deXjh9X0_U
Panel interview at MAMI(Mumbai Academy of Moving Image) Film Festival

Williams on the controversial nature of his flitting between football codes. Sonny Bill Williams regrets nothing http://www.smh.com.au/rugby-league/league-news/sonny-bill-williams-regrets-nothing-20131129-2yfvd.html, by Brad Walter, Sydney Morning Herald, dated 29 November 2013.

Letter to his mother (July 15, 1956) as quoted in Che Guevara: A Revolutionary Life (1997) by Jon Lee Anderson ISBN 0802116000

Lowe v. Lowe (1899), L. R. P. D. C. A. [1899], p. 209.

Source: 1880s, Incidents and Anecdotes of the Civil War (1885), p. 296
Context: He did not say a monument to what, but he meant, I am sure, to leave it as a monument to the loyalty of our soldiers, who would bear all the horrors of Libby sooner than desert their flag and cause. We struggled on, the great crowd preceding us, and an equally dense crowd of blacks following on behind all so packed together that some of them frequently sang out in pain.

2010-, Ai Weiwei Says Blind Dissident’s Escape Will Inspire Chinese, 2012

“I could not leave this team at this stage of their development.”
Joint Interview with The Times and Daily Mail (2009)
Context: I want to go to the end of my job here. I built this team, I want to deliver with this team and I feel if I left I would have in some way betrayed my own beliefs. It is as simple as that. It was nothing to do with what Real Madrid has done. It was about Arsenal. I have a project here that I started three or four years ago and I want to reach the end of it. I could not leave this team at this stage of their development.