“My proof that homosexuality is not a choice? A question for my straight male readers: Is there anything I could do or say or write that would convince you to willingly, happily, eagerly, anxiously, deliriously, lustfully put my dick in your mouth and leave it there until I had an orgasm? I rest my case.”

Source: Apathy and Other Small Victories

Source: Othello

Source: True Grit (1968), Chapter 3, p. 59 : 'Mattie Ross,' refusing 'Rooster Cogburn's' offer of a drink of whiskey

As quoted in The Guardian (8 June 1983). p. 82
Attributed

Final lines of his Richard Dimbleby lecture Shaking Hands With Death on euthanasia and assisted suicide, quoted in "Terry Pratchett: my case for a euthanasia tribunal" in The Guardian (2 February 2010) http://www.guardian.co.uk/society/2010/feb/02/terry-pratchett-assisted-suicide-tribunal
General sources
Context: I dare say that quite a few people have contemplated death for reasons that much later seemed to them to be quite minor. If we are to live in a world where a socially acceptable "early death" can be allowed, it must be allowed as a result of careful consideration.
Let us consider me as a test case. As I have said, I would like to die peacefully with Thomas Tallis on my iPod before the disease takes me over and I hope that will not be for quite some time to come, because if I knew that I could die at any time I wanted, then suddenly every day would be as precious as a million pounds. If I knew that I could die, I would live. My life, my death, my choice.

The Official Website of the Senate of the Philippines http://www.senate.gov.ph/press_release/2013/0410_escudero1.asp
2013, Mid-Term Campaign Trail

By The River Piedra I Sat Down and Wept (1994)
Source: By the River Piedra I Sat Down and Wept
Context: I am going to sit here with you by the river. If you go home to sleep, I will sleep in front of your house. And if you go away, I will follow you — until you tell me to go away. Then I'll leave. But I have to love you for the rest of my life.

Rayuela (Hopscotch) (1963)