“While my actions were meant with the best of intentions, my actions also fell below the standards of transparency and openness that I have promoted and advocated. I offer a fulsome apology to you and to the government for what has happened and offer my resignation.”

Source: A Dictionary of Thoughts, 1891, p. 483.

Source: The Hound of the Baskervilles

As quoted in The Times (11 July 2003)
Context: I know that in my public life I fell below the standards that I had set myself... I have seen what is wrong but not done enough to put it right. I have been more critical than correct. I have had opportunities of great positions in the service of the state, but I have put them aside. I know that I have not devoted myself enough to promoting the good of others.

Song Shake Down The Stars

They ask if our nation wasn't using massive doses of violence to solve its problems to bring about the changes it wanted. Their questions hit home, and I knew that I could never again raise my voice against the violence of the oppressed in the ghettos without first having spoken clearly to the greatest purveyor of violence in the world today: my own government. For the sake of those boys, for the sake of this government, for the sake of the hundreds of thousands trembling under our violence I cannot be silent.
1960s, Why I Am Opposed to the War in Vietnam (1967)

Source: Clockwork Prince

William Cobbett, "Parliamentary History".
Speech in the House of Commons, supporting a motion of censure on the government of Lord North, 15 March 1782.

Source: Understanding Our Mind: 50 Verses on Buddhist Psychology

Letter to Barack Obama (2013)