"[I]t is our interest and our task to make the revolution permanent until all the more or less propertied classes have been driven from their ruling positions, until the proletariat has conquered state power and until the association of the proletarians has progressed sufficiently far – not only in one country but in all the leading countries of the world – that competition between the proletarians of these countries ceases and at least the decisive forces of production are concentrated in the hands of the workers. Our concern cannot simply be to modify private property, but to abolish it, not to hush up class antagonisms but to abolish classes, not to improve the existing society but to found a new one."

"Revolutions are the locomotives of history."

"Did you not read our articles about the June revolution, and was not the essence of the June revolution the essence of our paper? Why then your hypocritical phrases, your attempt to find an impossible pretext? We have no compassion and we ask no compassion from you. When our turn comes, we shall not make excuses for the terror. But the royal terrorists, the terrorists by the grace of God and the law, are in practice brutal, disdainful, and mean, in theory cowardly, secretive, and deceitful, and in both respects disreputable."

"[T]he very cannibalism of the counterrevolution will convince the nations that there is only one way in which the murderous death agonies of the old society and the bloody birth throes of the new society can be shortened, simplified and concentrated, and that way is revolutionary terror."

"A house may be large or small; as long as the neighboring houses are likewise small, it satisfies all social requirement for a residence. But let there arise next to the little house a palace, and the little house shrinks to a hut. The little house now makes it clear that its inmate has no social position at all to maintain, or but a very insignificant one; and however high it may shoot up in the course of civilization, if the neighboring palace rises in equal or even in greater measure, the occupant of the relatively little house will always find himself more uncomfortable, more dissatisfied, more cramped within his four walls."

"Is that to say we are against Free Trade? No, we are for Free Trade, because by Free Trade all economical laws, with their most astounding contradictions, will act upon a larger scale, upon the territory of the whole earth; and because from the uniting of all these contradictions in a single group, where they will stand face to face, will result the struggle which will itself eventuate in the emancipation of the proletariat."

"Die Philosophen haben die Welt nur verschieden interpretirt; es kommt aber darauf an, sie zu verändern."

"History is not like some individual person, which uses men to achieve its ends. History is nothing but the actions of men in pursuit of their ends."

"The only possible solution which will preserve Germany's honor and Germany's interest is, we repeat, a war with Russia."

"Indessen ist das gerade wieder der Vorzug der neuen Richtung, daß wir nicht dogmatisch die Welt antizipieren, sondern erst aus der Kritik der alten Welt die neue finden wollen. ... Ist die Konstruktion der Zukunft und das Fertigwerden für alle Zeiten nicht unsere Sache, so ist desto gewisser, was wir gegenwärtig zu vollbringen haben, ich meine die rücksichtslose Kritik alles Bestehenden, rücksichtslos sowohl in dem Sinne, daß die Kritik sich nicht vor ihren Resultaten fürchtet und ebensowenig vor dem Konflikte mit den vorhandenen Mächten."

"Reason has always existed, but not always in a rational form."

"It is a bad thing to perform menial duties even for the sake of freedom; to fight with pinpricks, instead of with clubs. I have become tired of hypocrisy, stupidity, gross arbitrariness, and of our bowing and scraping, dodging, and hair-splitting over words. Consequently, the government has given me back my freedom."

"“And your education! Is not that also social, and determined by the social conditions under which you educate, by the intervention, direct or indirect, of society, by means of schools, etc.? The Communists have not invented the intervention of society in education; they do but seek to alter the character of that intervention, and to rescue education from the influence of the ruling class.”"

"The executive of the modern State is but a committee for managing the common affairs of the whole bourgeoisie."

"The history of all hitherto existing societies is the history of class struggles."