"When you are young, you think you can leave and never look back. But you always do."

不能通过正式手段从非正式到正式。

债券市场是市场信心的最终衡量标准。

The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.

城市的穷人就像树的根：看不见，但对生存至关重要。

在科学中，合作至关重要——没有人能独自完成。

要养活世界，我们必须首先学会尊重地球的极限。

The key to success is to keep growing in all areas of life - mental, emotional, spiritual, as well as physical.

The only true thoughts are those which do not understand themselves.

我不考虑过去。我不考虑未来。我只考虑现在。