The proper study of psychology is not what the mind is, but what the mind does.
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.
Strive for excellence, not mediocrity.
当没有人相信你时,你必须相信自己。
You are never too old to set another goal or to dream a new dream.