生命的意义因人而异，因时而异。

The secret of change is to focus all your energy not on fighting the old, but on building the new.

Arrange whatever pieces come your way.

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

Diversity in thought leads to innovation; diversity in people leads to strength.

经济学的第一课是稀缺：从来没有足够的任何一种东西能够满足所有人对其需要。政治学的第一课是摒弃经济学的第一课。