胜利越艰难，赢得的快乐就越大。
The more difficult the victory, the greater the happiness in winning.
History is a nightmare from which I am trying to awake.
Every piece of leather tells a story; our job is to make it a good one.
"The only thing that is truly infinite is the human soul."
Mathematics is a living, breathing discipline, constantly evolving with new ideas.
诗歌是心灵的语言。