The art of teaching is not to impart knowledge, but to inspire, awaken, and encourage.

人们不禁会感到这些数学公式拥有独立的存在和自己的智慧，它们比我们更聪明，甚至比它们的发现者更聪明。

"A man's memory might have only a hundred clear days in it and he has lived thousands."

真相很少是纯粹的，也从不简单。