谁知道"TO BE IS TO DO."的意思?

谁知道TO BE IS TO DO.的意思? 谁知道To be,To do,To have to be is to do to be is to do To be is to do 有谁知道be obliged to do to be is to do socrate ,to do is to be sartre ,do be do be do To be is to do 是啥意思 to be is to do如何正确理解TO BE IS TO DO 这话的真正含义?THANKS ... To be is to be sure to do be surprised to do be supposed to do be surprised to do be said to do be trying to do be important to do be strength to do