The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

The development of attention in childhood is a foundation for self-regulation and academic achievement.

The more you learn, the more you know. The more you know, the more you forget. The more you forget, the less you know. So why bother to learn?

关于MM定理最重要的事情不是它的现实性，而是它的简单性。