The only limit to our realization of tomorrow is our doubts of today.

"In the end, we will remember not the words of our enemies, but the silence of our friends."

出自北齐·颜之推《颜氏家训·勉学》。积累财富千万，也胜不过多读些书有用。古代有“书中自有黄金屋，书中自有颜如玉”的说法，读好书就能财源滚滚、美女满室。这句话意在强调读书以立世的重要意义。

数学的美只向更有耐心的追随者展示。