Loneliness is not lack of company, loneliness is lack of purpose.
The essence of science is to ask the right questions.
人生就是一列开往坟墓的列车,路途上会有很多站,很难有人可以自始至终陪着走完。当陪你的人要下车时,即使不舍也该心存感激,然后挥手道别。
A mathematician is a device for turning coffee into theorems.
International politics is a brutal and unforgiving arena, where states constantly strive to maximize their power and security.