Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
永远不要低估一个想法改变世界的力量。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
What seems to us as bitter trials are often blessings in disguise