“Until my dying day I will look back with pride that I found the courage to come face to face in battle against the spectre which for time immemorial has been injecting poison into me and into men of my nature. Many have been driven to suicide because all their happiness in life was tainted. Indeed, I am proud that I found the courage to deal the initial blow to the hydra of public contempt.”

Variant translation: I have never looked upon ease and happiness as ends in themselves — such an ethical basis I call more proper for a herd of swine. The ideals which have lighted me on my way and time after time given me new courage to face life cheerfully, have been Truth, Goodness, and Beauty. Without the sense of fellowship with men of like mind, of preoccupation with the objective, the eternally unattainable in the field of art and scientific research, life would have seemed to me empty. The ordinary objects of human endeavor — property, outward success, luxury — have always seemed to me contemptible.
1930s, Mein Weltbild (My World-view) (1931)
Context: I have never looked upon ease and happiness as ends in themselves — this critical basis I call the ideal of a pigsty. The ideals that have lighted my way, and time after time have given me new courage to face life cheerfully, have been Kindness, Beauty, and Truth. Without the sense of kinship with men of like mind, without the occupation with the objective world, the eternally unattainable in the field of art and scientific endeavors, life would have seemed empty to me. The trite objects of human efforts — possessions, outward success, luxury — have always seemed to me contemptible.

Interview with GQ http://www.gq.com/story/melania-trump-gq-interview (April 27, 2016)

The Soul of a Butterfly, 2004
Variant: All through my life I have been tested. My will has been tested, my courage has been tested, my strength has been tested. Now my patience and endurance are being tested.
Source: The Soul of a Butterfly: Reflections on Life's Journey

Quoted in The Guardian, Wednesday 4 July 2012 http://www.guardian.co.uk/culture/2012/jul/04/eric-sykes

Noah Brooks, scribe for the Sacramento Union, writing in the Harper’s Weekly for July 1865, 3 months after Lincoln had died, reported that the Lincoln once said this, at an unspecified date; as reported in "Did Abraham Lincoln Actually Say That Obama Quote?" by James M. Cornelius, The Daily Beast (9 August 2012) http://www.thedailybeast.com/articles/2012/09/08/did-abraham-lincoln-actually-say-that-obama-quote.html
Posthumous attributions

As quoted in "International Arbitration" by W. H. Dellenback in The Commencement Annual, University of Michigan (30 June 1892) and in A Half Century of International Problems: A Lawyer's Views (1954) by Frederic René Coudert, p. 180.
Context: Though I have been trained as a soldier, and participated in many battles, there never was a time when, in my opinion, some way could not be found to prevent the drawing of the sword. I look forward to an epoch when a court, recognized by all nations, will settle international differences, instead of keeping large standing armies as they do in Europe.

"Are You Happy Now?"
2000s, Hotel Paper (2003)
Context: Now, don't just walk away. Pretending everything's okay, and you don't care about me. And I know there's just no use, when all your lies become your truths and I don't care. Could you look me in the eye? And tell me that you're happy now? Would you tell it to my face? Or have I been erased? Are you happy now? Are you happy now?

Speech in Manchester (21 April 1908), quoted in Better Times: Speeches by the Right Hon. D. Lloyd George, M.P., Chancellor of the Exchequer (London: Hodder & Stoughton, 1910), p. 46.
Chancellor of the Exchequer

Courage
Source: "I am That." P.105.