力气单薄就不要去背负重物，说话没分量就不要规劝别人。

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.

快乐的童年会持续一生。