"To be useful was the best thing the old men ever hoped for themselves, and to be aimless was their worst fear."

音乐的目的是使头脑清醒和平静，从而使其容易受到神圣的影响。

伟大的领导者愿意做出他人回避的艰难决定。

写作是唯一一个不赚钱也不会被人嘲笑的职业。

The only way to get better is to keep working.

数学的本质在于它的自由。