经济学特别是宏观经济学中说的投资是耐用资本品如厂房设备的生产，而平常说的“投资”是指购买资产如股票，这和经济学中的投资不同，为了区分，这种投资被称为金融投资。
Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:
Imagination is the only weapon in the war against reality.
Nature， to be commanded， must be obeyed.
艺术是过去与现在之间的对话。
The past is a source of knowledge, and the future is a source of hope. Love of the past implies faith in the future.
改变世界的唯一方法是改变自己。
The night is a great canvas, but the stars are its paint.