“Life is short and truth works far and lives long: let us speak the truth.”

:s:The World as Will and Representation/Preface to the First Edition, last paragraph.
Mostly quoted rather incorrectly as: All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Und so, nachdem ich mir den Scherz erlaubt, dem eine Stelle zu gönnen, in diesem durchweg zweideutigen Leben kaum irgend ein Blatt zu ernsthaft seyn kann, gebe ich mit innigem Ernst das Buch hin, in der Zuversicht, daß es früh oder spät diejenigen erreichen wird, an welche es allein gerichtet seyn kann, und übrigens gelassen darin ergeben, daß auch ihm in vollem Maaße das Schicksal werde, welches in jeder Erkenntniß, also um so mehr in der wichtigsten, allezeit der Wahrheit zu Theil ward, der nur ein kurzes Siegesfest beschieden ist, zwischen den beiden langen Zeiträumen, wo sie als paradox verdammt und als trivial geringgeschätzt wird. Auch pflegt das erstere Schicksal ihren Urheber mitzutreffen.— Aber das Leben ist kurz und die Wahrheit wirkt ferne und lebt lange: sagen wir die Wahrheit.
Die Welt als Wille und Vorstellung. Leipzig 1819. Vorrede. p.XVI books.google https://books.google.de/books?id=0HsPAAAAQAAJ&pg=PR16
The World as Will and Representation (1819; 1844; 1859)

"Ain't It the Truth" originally written for Cabin in the Sky (1943), but pulled from the show, and later included in Jamaica (1957) - Lena Horne version http://www.youtube.com/watch?v=EMSyXuvNpeM
Context: Life is short, short, brother!
Ain't it the truth?
And there is no other
Ain't it the truth?
You gotta rock that rainbow while you still got your youth!
Oh! Ain't it the solid truth?

Die Wahrheit kann warten: denn sie hat ein langes Leben vor sich.
Willen in der Natur (On the Will in Nature), 1836; in the chapter Einleitung (Introduction)
Variant translation by Karl Hillebrand:
Truth can bide its time, for it has a long life before it.
Other

"Dreaming Awake at the End of Time" (13 December 1998) 11:30 - 15:29 https://www.youtube.com/watch?v=KboPUQ0xCDs
Context: For some reason, a balkanization of epistemology is taking place. And what I mean by that is: there is no longer a commonality of understanding. I mean, for some people quantum physics provides the answers. Their next door neighbors may look to the channeling of archangels with equal fervor. … It is accompanied by a related phenomenon which is technology, or the historical momentum of things, is creating such a bewildering social milieu that the monkey mind cannot find a simple story, a simple creation myth or redemption myth to lay over the crazy contradictory patchwork of profane techno-consumerist post-McLuhanist electronic pre-apocalyptics existence. And so into that dimension of anxiety created by this inability to parse reality rushes a bewildering variety of squirrelly notions, epistemological cartoons if you will. … Conspiracy theory, in my humble opinion … is a kind of epistemological cartoon about reality. I mean, isn't it so simple to believe that things are run by the greys, and that all we have to do is trade sufficient fetal tissue to them and then we can solve our technological problems, or isn't it comforting to believe that the Jews are behind everything, or the Communist Party, or the Catholic Church, or the Masons. Well, these are epistemological cartoons, you know, it is kindergarten in the art of amateur historiography.
I believe that the truth of the matter is far more terrifying, that the real truth that dare not speak itself, is that no one is in control, absolutely no one.… Nobody is in control. This stuff is ruled by the equations of dynamics and chaos. Now, there may be entities seeking control — the World Bank, the Communist Party, the rich, the somebody-or-others — but to seek control is to take enormous aggravation upon yourself. … Because this process which is underway will take the control-freak by the short and curly and throw them against the wall. It's like trying to control a dream, you see.
The global destiny of the species is somehow unfolding with the logic of a dream.

Source: Dramatis Personae (1864), Rabbi Ben Ezra, Line 121.
Context: Be there, for once and all,
Severed great minds from small,
Announced to each his station in the Past!
Was I, the world arraigned,
Were they, my soul disdained,
Right? Let age speak the truth and give us peace at last!
Now, who shall arbitrate?
Ten men love what I hate,
Shun what I follow, slight what I receive;
Ten, who in ears and eyes
Match me: we all surmise,
They this thing, I that: whom shall my soul believe?

Source: Henry V

2009, A New Beginning (June 2009)

Source: Let Me be a Woman