The greatest problem of any art is to create a presence.

The most valuable resource in any company is its people—invest in them wisely.

"I don't want to be a product of my environment. I want my environment to be a product of me."

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

弦理论的景观是广阔而复杂的，可能有10^500个不同的可能宇宙。