“Because I remember, I despair. Because I remember, I have the duty to reject despair.”
Hope, Despair, and Memory (1986)
Context: Because I remember, I despair. Because I remember, I have the duty to reject despair. I remember the killers, I remember the victims, even as I struggle to invent a thousand and one reasons to hope.
Help us to complete the source, original and additional information
Elie Wiesel 155
writer, professor, political activist, Nobel Laureate, and … 1928–2016Related quotes

This appears to have been originally written by John Briley in the screenplay http://www.dailyscript.com/scripts/Gandhi.txt for the movie, Gandhi (1982), spoken by Ben Kingsley, playing Gandhi. The earliest [partial] misattribution to Gandhi appears to be by Ronald Reagan in an address http://www.nytimes.com/1984/09/25/world/transcript-of-reagan-s-address-to-the-un-general-assembly.html?pagewanted=all to the United Nations General Assembly on 24 September 1984 (also a misquotation, substituting the word fail for fall). John S. Dunne misattributes the first sentence in The Peace of the Present (1991) on p. 50 https://books.google.com/books?id=NYIJAAAAIAAJ&q=%22when+Gandhi+says%22+%22When+I+despair,+I+remember+that+all+through+history+the+way+of+truth+and+love+has+always+won.%22&dq=%22when+Gandhi+says%22+%22When+I+despair,+I+remember+that+all+through+history+the+way+of+truth+and+love+has+always+won.%22&hl=en&sa=X&ved=0ahUKEwjhufXN09LWAhWG7SYKHbRdCJ0Q6AEIJzAA, just after misattributing the same first two sentences that Reagan did. Dunne also misattributes the final part of the quotation in the same book on p. 34 https://books.google.com/books?id=NYIJAAAAIAAJ&q=%22Think+of+it+%E2%80%94+always%E2%80%A6%22+%22When+you+are+in+doubt+that+that+is+God%27s+way,+the+way+the+world+is+meant+to+be%E2%80%A6+think+of+that.%22&dq=%22Think+of+it+%E2%80%94+always%E2%80%A6%22+%22When+you+are+in+doubt+that+that+is+God%27s+way,+the+way+the+world+is+meant+to+be%E2%80%A6+think+of+that.%22&hl=en&sa=X&ved=0ahUKEwjEw57e1tLWAhUSdiYKHUNiA2kQ6AEIMTAC.
Misattributed
Context: When I despair, I remember that all through history the way of truth and love has always won. There have been tyrants and murderers, and for a time they can seem invincible. But in the end they always fall. Think of it—always… When you are in doubt that that is God's way, the way the world is meant to be… think of that.
“It's not the despair, Laura, I can stand the despair. It's the hope.”
Clockwise (1986), cited from Malcolm Page File on Frayn (London: Methuen, 1994) p. 65.

Credo quia absurdam — I believe because it is absurd
The Tragic Sense of Life (1913), Conclusion : Don Quixote in the Contemporary European Tragi-Comedy

“I was very fond of Lagneau’s phrase: “I have no comfort but in my absolute despair.”
Source: Memoirs of a Dutiful Daughter