真理是经得起经验考验的东西。

The only time success comes before work is in the dictionary.

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.

The arc of the moral universe is long， but it bends toward justice.

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.