Even in abstraction, mathematics has profound real-world applications.

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.

You have to be willing to fail, to be wrong, to keep trying.

生活就是关于成长和改变。当你停止成长，你就停止了生活。