The laws of physics as we know them may be just a small part of a much larger set of laws.

没有改变就不可能进步，而无法改变思想的人也无法改变任何事。

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.