True friends are not those who have endless topics to talk about, but those who can stay together without feeling awkward even if they don't speak.
真正的朋友，不是在一起有聊不完的话题，而是在一起，就算不说话，也不会感到尴尬。
The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.
The conjectures of the Langlands program are not merely problems to be solved but a vision of how mathematics should be.