When we speak of 'meaning' a word， we are in the first instance speaking of a certain kind of act.

I write not to explain the world but to understand it.

The merit of Marx is that he suddenly produces a qualitative change in the history of social thought. He interprets history, understands its dynamic, predicts the future, but in addition to predicting it, he expresses a revolutionary concept: the world must not only be interpreted, it must be transformed.