A.

“You know how much I used to like Plato. Today I realize he lied. For the things of this world are not a reflection of the ideal, but a product of human sweat, blood and hard labour. It is we who built the pyramids, hewed the marble for the temples and the rocks for the imperial roads, we who pulled the oars in the galleys and dragged wooden ploughs, while they wrote dialogues and dramas, rationalized their intrigues by appeals in the name of the Fatherland, made wars over boundaries and democracies. We were filthy and died real deaths. They were 'aesthetic' and carried on subtle debates.
There can be no beauty if it is paid for by human injustice, nor truth that passes over injustice in silence, nor moral virtue that condones it.”
― Tadeusz Borowski, This Way for the Gas, Ladies and Gentlemen

“When asked whether or not we are Marxists, our position is the same as that of a physicist, when asked if he is a “Newtonian” or of a biologist when asked if he is a “Pasteurian.”
There are truths so evident, so much a part of the peoples’ knowledge, that it is now useless to debate them. One should be a “Marxist” with the same naturalness with which one is a “Newtonian” in physics or a “Pasteurian.” If new facts bring about new concepts, the latter will never take away that portion of truth possessed by those that have come before.

Such is the case, for example, of “Einsteinian” relativity or of Planck’s quantum theory in relation to Newton’s discoveries. They take absolutely nothing away from the greatness of the learned Englishman. Thanks to Newton, physics was able to advance until it achieved new concepts of space. The learned Englishman was the necessary stepping-stone for that.

Obviously, one can point to certain mistakes of Marx, as a thinker and as an investigator of the social doctrines and of the capitalist system in which he lived. We Latin Americans, for example, cannot agree with his interpretation of Bolivar, or with his and Engels’ analysis of the Mexicans, which accepted as fact certain theories of race or nationality that are unacceptable today.

But the great men who discover brilliant truths live on despite their small faults and these faults serve only to show us they were human. That is to say, they were human beings who could make mistakes, even given the high level of consciousness achieved by these giants of human thought.

This is why we recognize the essential truths of Marxism as part of humanity’s body of cultural and scientific knowledge. We accept it with the naturalness of something that requires no further argument.”
― Ernesto "Che" Guevara

“I am nothing but I must be everything.”
― Karl Marx, Critique of Hegel's Philosophy of Right

“I'm a pessimist because of intelligence, but an optimist because of will.”
― Antonio Gramsci, Antonio Gramsci: Prison Letters