书是一次你可以不离开椅子就完成的旅程。
People like us in situations like this, we gotta make sure they see us.
Happiness comes from between. It is not something that you can find, acquire, or achieve directly. You have to get the conditions right and then wait.
数学家是能在定理间找到类比的人;更好的数学家能在理论间看到类比;而最优秀的数学家能注意到类比之间的类比。
凡是教师缺乏爱的地方,无论品格还是智慧都不能充分地或自由地发展。