过去总是紧张的,未来才是完美的。
The improver of natural knowledge absolutely refuses to acknowledge authority as such.  
The purpose of computation is insight, not numbers.
The stock market is filled with individuals who know the price of everything, but the value of nothing.
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。