"The difference between correlation and causation is fundamental in empirical work."

Sustainability is not just a trend, it's our responsibility to the future.

The natural effort of every individual to better his own condition， when suffered to exert itself with freedom and security， is so powerful a principle that it is alone， and without any assistance， not only capable of carrying on the society to wealth and prosperity but of surmounting a hundred impertinent obstructions with which the folly of human laws too often encumbers its operations.

企业的角色是生产能够改善人们生活的产品和服务，同时使用更少的资源，并且要合法行事、诚信经营。

弹奏美妙的五弦琴，读滋味无穷的圣贤书。挥笔写下文章，述说那古代圣王们的教范。点评：作者表示自己归隐田园后，以著述为中心，阐明圣则。苟纵心于物外，安知荣辱之所如？我将置身于世人之外，哪管什么荣耀与耻辱？