不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life.

Simplicity is the ultimate sophistication.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

过去是一个陌生的国度；那里的人们行事方式不同。