A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
We must embrace change and lead the change, or we will be left behind.
你必须愿意犯错；重要的是不要一遍又一遍地犯同样的错误。
The mind is a constantly unfolding process.
The environment is where we all meet; where we all have a mutual interest; it is the one thing all of us share.
The unexamined life is not worth living.