Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

【释义】：礼节重在相互回应。送出礼遇而对方不回应，这是不合礼数的；接受了别人的礼遇却不回报，同样也是不符合礼的要求。

数学是上帝用来书写宇宙的语言。

真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。