The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.

我不让失败定义我，我让它磨砺我。

"The hardest part of being a machine is pretending to be human."

That is what learning is. You suddenly understand something you've understood all your life, but in a new way.

Auctions are a microcosm of how markets function—information, competition, and incentives all interact.

解释：美色各不相同，看起来都很美好；动听的乐声各不相同，听起来都很快意。

I'm interested in pushing buttons and being provocative and making people think.