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Escribir es resistir, crear un espacio de libertad en un mundo de limitaciones.

最大的勇氣是不顧一切地去愛。

〈中國革命史〉

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.

Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.

I think that the thing that makes mathematics worthwhile is the fact that it has this incredible structure that you can explore and discover.

科學中的創新往往來自于以新的方式看待老問題。

To be Irish is to know that in the end the world will break your heart.

Success is meaningless if you don't have the right people to share it with.

You have to be willing to make mistakes; the big thing is to not make the same mistake over and over again.