The most important actions are never comfortable.

A mathematician's work is never truly finished; there is always more to explore.

一个人直到能够超越个人利益的狭隘局限，关注整个人类的利益，他才真正开始生活。

没有祖国的人，就像没有歌声的夜莺。

Three things are necessary for the salvation of man: to know what he ought to believe； to know what he ought to desire； and to know what he ought to do.

Purchase the most recent tourist guidebook to your home town or region. You’ll learn a lot by playing the tourist once a year.

音乐是灵魂的声音。如果你能说话，你就能唱歌；如果你能走路，你就能跳舞。