"Life is movement, and movement is life."

"The first requisite of all history is the production of the means to satisfy these needs, the production of material life itself."

"The first class opposition that appears in history coincides with the development of the antagonism between man and woman in monogamous marriage, and the first class oppression coincides with that of …"

"The state, then, has not existed from all eternity. There have been societies that did without it, that had no idea of the state and state power. At a certain stage of economic development, which was …"

"A nation cannot be free and at the same time continue to oppress other nations. The emancipation of Germany cannot therefore take place without the emancipation of Poland from German oppression."