理性预期假说并不意味着人们能完美预测未来；它意味着人们不会犯系统性错误。

I'm not a body, I'm a mind.

You build your life around what happens to you.

全球性挑战需要全球性解决方案。

He said that the way of the world is to bloom and to flower and die but in the affairs of men there is no waning and the noon of his expression signals the onset of night. His spirit is exhausted at the peak of its achievement. His meridian is at once his darkening and the evening of his day.