你必须能够自嘲，不要把自己看得太认真。
"Technique without vision is empty, vision without technique is blind."
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.
The choice for mankind lies between freedom and happiness and for the great bulk of mankind, happiness is better.
没有充足的食物供应，今天所知道的文明就不可能进化，也不可能生存。
You have to fight through some bad days to earn the best days of your life.