"Books are the quietest form of rebellion."
【讲解】：聪明智慧的人爱水，有仁德的人爱山。聪明智慧的人爱活跃，有仁德的人爱沉静。聪明智慧的人快乐，有仁德的人长寿。
Mathematics is a living subject, constantly evolving and growing.
In the quest for understanding the cosmos, every question answered leads to a dozen more.