If I have seen further, it is by standing on the shoulders of giants.
The essence of mathematics lies in its freedom.
"The stars are brightest when the night is darkest."
People are capable, at any time in their lives, of doing what they dream of.
毫无疑问，通过将以自我为中心的生活换成无私的生活，我们获得了强烈的自尊。无私的人，即便是那些最谦卑的，他们的虚荣都是无边的。
If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.