最大的幸福是知道不幸的根源。
The greatest happiness is to know the source of unhappiness.
Sometimes the most important thing in a whole day is the rest we take between two deep breaths.
我想发现自己，我出生的原因，以及生命的意义。
机智是一种在不树敌的情况下表达观点的艺术。
The Milky Way’s black hole is our closest laboratory for studying extreme gravity.
With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.
To die laughing must be the most glorious of all glorious deaths！
——在广州全国青年联合会演说，1923年10月21日
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.