“…but then I am unlike other people I dare say.”

Source: No Longer Human

"On Monsieur's Departure" (February 1582).

Source: Dance with the Devil

In an interview in Dhaka. https://www.theguardian.com/world/2015/sep/16/british-jihadis-bangladesh-extremism-uk-isis-sheikh-hasina
Context: All the democratic institutions are working and people are satisfied and people are enjoying it. So the way you say I am dominating, I am not dominating. I am serving people.

Source: Reinvention: How to Make the Rest of Your Life the Best of Your Life

Interview to Cosmopolitan (2016)

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.