The best way to buy a stock is when it's cheap, and the best time to sell is when it's expensive.

大国总是在寻找机会以牺牲对手为代价来获得权力，如果他们认为使用武力会带来战略优势，他们就会使用武力。

The only thing we have to fear is fear itself.

最好的科学家是那些在未知面前保持谦逊的人。