People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.
The language of mathematics is the language of the universe, and by learning it, we can understand the cosmos.
Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people will die tomorrow night, so don't give up today.
自由是做法律允许的事情的权利。
I don’t let mistakes define me, I let them refine me.
科学的进步不是一条直线，而是一系列曲折，有时在新的进展之前似乎会倒退。