当你停止相信的那一刻，你就已经失败了。
The moment you stop believing, you're already defeated.
"Escrever é uma forma de resistência, de manter viva a memória e a identidade de um povo."
学习数学的唯一方法就是做数学。
The very essence of the creative is its novelty, and hence we have no standard by which to judge it.