You can't change what you are, only what you do.

You can be the ripest, juiciest peach in the world, and there's still going to be somebody who hates peaches.

The highest form of theory is the ability to simplify complex things into simple and clear principles.

The price of getting what you want is getting what you once wanted.

Some people don't like change, but you need to embrace change if the alternative is disaster.

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。