We can acknowledge that oppression will always be with us, and still strive for justice. We can admit the intractability of deprivation, and still strive for dignity. Clear-eyed, we can understand that there will be war, and still strive for peace. We can do that — for that is the story of human progress; that's the hope of all the world; and at this moment of challenge, that must be our work here on Earth.

Nobel Prize acceptance speech (December 2009)