我们每天支配的时间是有弹性的；我们感受到的激情会扩展它，我们激发的激情会收缩它；而习惯会填补剩下的部分。
The time which we have at our disposal every day is elastic; the passions that we feel expand it, those that we inspire contract it; and habit fills up what remains.
The process of doing mathematics is more important than the result.
The best preparation for good work tomorrow is to do good work today.
我不是创造者，我是毁灭者。
"The only thing that is truly eternal is the human spirit."
历史学家的任务是让死者重生。