马克思的功绩在于他忽然在社会思想史上产生了一个质的变化。他解释历史，理解其动力，预测未来，但除了预测之外，他还表达了一个革命性的概念：世界不仅必须被解释，还必须被改变。
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.
我总是尽量保持积极，享受每一刻。
我从不回头看，我向前看。
The deepest principle in human nature is the craving to be appreciated.
The best way to predict the future is to invent it.
The dead might as well try to speak to the living as the old to the young.
