„And remember: you must never, under any circumstances, despair. To hope and to act, these are our duties in misfortune.“
Source: Doctor Zhivago
Related quotes

„Because I remember, I despair. Because I remember, I have the duty to reject despair.“
— Elie Wiesel writer, professor, political activist, Nobel Laureate, and Holocaust survivor 1928 - 2016
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.
— Carlos Castaneda Peruvian-American author 1925 - 1998
Source: The Teachings of Don Juan: A Yaqui Way of Knowledge

— Raymond Williams philosopher 1921 - 1988
"The Politics of Nuclear Disarmament" (1980), in Resources of Hope (1989).

— Edmund Burke, book An Appeal from the New to the Old Whigs
Source: An Appeal from the New to the Old Whigs (1791), p. 442

„If you are wise, mingle these two elements: do not hope without despair, or despair without hope.“
Si sapis, alterum alteri misce: nec speraveris sine desperatione nec desperaveris sine spe.
— Seneca the Younger Roman Stoic philosopher, statesman, and dramatist -4 - 65 BC
Alternate translation: Hope not without despair, despair not without hope. (translated by Zachariah Rush).
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter CIV: On Care of Health and Peace of Mind, Line 12

— Nathan Bedford Forrest Confederate Army general 1821 - 1877
Regarding black voting, as quoted in Report of the Joint Select Committee.

„I never lost hope, and never did I despair of coming back alive.“
— James Robinson Risner Recipient of the Purple Heart medal 1925 - 2013
Source: "Nine Feet Tall" in Air Force Magazine https://www.airforcemag.com/article/0212tall/ (1 February 2012)

— Ulysses S. Grant 18th President of the United States 1822 - 1885
1870s, Eighth State of the Union Address (1876)

— Alex Salmond Scottish National Party politician and former First Minister of Scotland 1954
Principles and Priorities : Programme for Government (September 5, 2007)

— Margaret Thatcher British stateswoman and politician 1925 - 2013
Speech at "Youth for Europe" Rally (2 June 1979) http://www.margaretthatcher.org/document/104088
First term as Prime Minister

— Michael Foot British politician 1913 - 2010
Speech http://hansard.millbanksystems.com/commons/1982/apr/03/falkland-islands in the House of Commons (3 April 1982) after Argentina's invasion of the Falkland Islands.
1980s

„There is never no hope left. Remember.“
— Larry Niven, book The Ringworld Engineers
Source: The Ringworld Engineers (1980), p. 280

— Robert H. Jackson American judge 1892 - 1954
American Communications Association v. Douds, 339 U.S. 382, 444 (1950)
Judicial opinions

— Miguel de Unamuno 19th-20th century Spanish writer and philosopher 1864 - 1936
Credo quia absurdam — I believe because it is absurd
The Tragic Sense of Life (1913), Conclusion : Don Quixote in the Contemporary European Tragi-Comedy

— Koichi Tohei Japanese aikidoka 1920 - 2011
Among the various ways of performing intoku, to walk the way of the universe and to lead others along this way is best.
20. Intoku - good done in secret
Ki Sayings (2003)