Variant: There is no document of civilization which is not at the same time a document of barbarism.
Source: Theses on the Philosophy of History (1940), VII
Source: On the Concept of History

“Let no thought pass incognito, and keep your notebook as strictly as the authorities keep their register of aliens.”

Walter Benjamin

“The destructive character knows only one watchword: make room. And only one activity: clearing away. His need for fresh air and open space is stronger than any hatred.”

Walter Benjamin

"The Destructive Character" Frankfurter Zeitung (20 November 1931)
Source: Reflections: Essays, Aphorisms, Autobiographical Writings

“Mechanical reproduction emancipates the work of art from its parasitical dependence on ritual. To an ever greater degree the work of art reproduced becomes the work of art designed for reproducibility. From a photographic negative, for example, one can make any number of prints; to ask for the “authentic” print makes no sense. But the instant the criterion of authenticity ceases to be applicable to artistic production, the total function of art is reversed. Instead of being based on ritual, it begins to be based on another practice – politics.”

Walter Benjamin

Das Kunstwerk im Zeitalter seiner Reproduzierbarkeit The Work of Art in the Age of Mechanical Reproduction (1935)

“Thinking involves not only the flow of thoughts, but their arrest as well.”

Walter Benjamin

Source: (1940), XVII

“If the original does not exist for the reader's sake, how could the translation be understood on the basis of this premise?”

Walter Benjamin

Besteht das Original nicht um dessentwillen, wie ließe sich dann die Übersetzung aus dieser Beziehung verstehen?
The Task of the Translator (1920)

“Every expression of human mental life can be understood as a kind of language, and this understanding, in the manner of a true method, everywhere raises new questions.”

Walter Benjamin

Jede Äußerung menschlichen Geisteslebens kann als eine Art der Sprache aufgefaßt werden, und diese Auffassung erschließt nach Art einer wahrhaften Methode überall neue Fragestellungen.
"On Language as Such and on the Language of Man" (1916), translated by E. Jephcott, in Walter Benjamin: Selected Writings, Vol. 1 (1996), p. 62

“In what time does man live? The thinkers have always known that he does not live in any time at all. The immortality of thoughts and deeds banishes him to a timeless realm at whose heart an inscrutable death lies in wait. … Devoured by the countless demands of the moment, time slipped away from him; the medium in which the pure melody of his youth would swell was destroyed. The fulfilled tranquility in which his late maturity would ripen was stolen from him. It was purloined by everyday reality, which, with its events, chance occurrences, and obligations, disrupted the myriad opportunities of youthful time, immortal time. … From day to day, second to second, the self preserves itself, clinging to that instrument: time, the instrument that it was supposed to play.”

Walter Benjamin

"The Metaphysics of Youth," in Walter Benjamin: Selected Writings, Vol. 1 (1996), pp. 10-11

“For me, it was like this: pronounced antipathy to conversing about matters of practical life, the future, dates, politics. You are fixated on the intellectual sphere as a man possessed may be fixated on the sexual: under its spell, sucked into it.”

Walter Benjamin

Mir schien: Ausgesprochene Unlust, mich über Dinge des praktischen Lebens, Zukunft, Daten, Politik zu unterhalten. Man ist an die intellektuelle Sphäre gebannt wie manchmal Besessene auf die sexuelle, ist von ihr angesaugt.
"Main features of my first impression of hashish" (18 December 1927), On Hashish (2006), p. 21
Main features of my first impression of hashish (1927)

“Everyone who achieves strives for totality, and the value of his achievement lies in that totality—that is, in the fact that the whole, undivided nature of a human being should be expressed in his achievement. But when determined by our society, as we see it today, achievement does not express a totality; it is completely fragmented and derivative. It is not uncommon for the community to be the site where a joint and covert struggle is waged against higher ambitions and more personal goals. … The socially relevant achievement of the average person serves in the vast majority of cases to repress the original and nonderivative, inner aspirations of the human being.”

Walter Benjamin

The Life of Students (1915)

“The question to address is that of the conscious unity of student life … the will to submit to a principle, to identify completely with an idea. The concept of "science" or scholarly discipline serves primarily to conceal a deep-rooted bourgeois indifference.”

Walter Benjamin

An das Leben der Studenten tritt die Frage nach seiner bewußten Einheit heran. ... Das Auszeichnende im Studentenleben ist in der Tat der Gegenwille, sich einem Prinzip zu unterwerfen, mit der Idee sich zu durchdringen. Der Name der Wissenschaft dient vorzüglich, eine tiefeingesessene, verbürgerte Indifferenz zu verbergen.
The Life of Students (1915)

“Scholarship, far from leading inexorably to a profession, may in fact preclude it. For it does not permit you to abandon it.”

Walter Benjamin

Der Beruf folgt so wenig aus der Wissenschaft, dass sie ihn sogar ausschließen kann. Denn die Wissenschaft duldet ihrem Wesen nach keine Lösung von sich.
The Life of Students (1915)

“Reminiscences, even extensive ones, do not always amount to an autobiography. … For even if months and years appear here, it is in the form they have in the moment of recollection. This strange form — it may be called fleeting or eternal — is in neither case the stuff that life is made of.”

Walter Benjamin

A Berlin Chronicle (1932–, unfinished), in Walter Benjamin: Selected Writings – vol. 2, pt. 2: 1931-1934, ed. Michael William Jennings, Harvard University Press, 2005, p. 612