A wise man said: before you speak， let your words pass through three gates. At the first gate， ask yourself， "Is it true？" At the second gate， ask "Is it necessary？" At the third gate， ask， "Is it kind？"

在数学中，提出问题的艺术必须比解决问题更有价值。

Nature speaks to us through patterns, even when those patterns are hidden beneath apparent randomness.