Selected Works, Vol 1 Quotes

“The question whether objective truth can be attributed to human thinking is not a question of theory but is a practical question. Man must prove the truth — i.e. the reality and power, the this-sidedness of his thinking in practice. The dispute over the reality or non-reality of thinking that is isolated from practice is a purely scholastic question.”
― Karl Marx, Selected Works, Vol 1

“It is not social consciousness that determines social being, but social being that determines social consciousness.”
― Karl Marx, Selected Works, Vol 1