自然界中有未知的力量；当我们完全无保留地把自己交给她时，她就会把这些力量借给我们；她向我们展示这些形式，我们的眼睛看不到，我们的智力不理解或怀疑。
There are unknown forces in nature; when we give ourselves wholly to her, without reserve, she lends them to us; she shows us these forms, which our watching eyes do not see, which our intelligence does not understand or suspect.
If you want real peace in the world， start with children.
一个好故事让你感觉不那么孤单。
在数学中，提出问题的艺术必须比解决问题更有价值。