我相信当一切似乎都出错时要坚强。我相信快乐的女孩是最漂亮的女孩。我相信明天是新的一天，我相信奇迹。

"if you think tough men are dangerous, wait until you see what weak men are capable of.

Every artist dips his brush in his own soul, and paints his own nature into his pictures.

数学的本质在于其自由性。