学习数学的最好方法就是去做数学。
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.
勇气是生命为给予平静所要求的代价。
We cannot change the past, but we can change our view of it.
"The only way to do great work is to love what you do."
It's okay if someone dislikes you. Not everyone has good taste.
It is not from the benevolence of the butcher， the brewer， or the baker that we expect our dinner， but from their regard to their own interest.