The only way to learn mathematics is to do mathematics.

Memory is a way of meeting.

人生最难学的是该过哪座桥，该烧哪座桥。

To know this world is to love it, and to love it is to grieve for it.

Freedom is man's capacity to take a hand in his own development. It is our capacity to mold ourselves.

"Die Kunst ist die Tochter der Freiheit."

成功不在于名利，而在于触动人心。