The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of an illimitable ocean of inexplicability.  

Good econometrics is like good carpentry—it's all about using the right tool for the job.

Every day is a new opportunity to change your life.

遵循天道，顺应地理，万物皆得其所。所以，抚慰他就安宁，折腾他就痛苦。尊崇他就可以为将领，贬斥则为俘虏。