在数学中,提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
父亲不慈爱,子女就不会孝顺;兄长不友爱,弟弟就不会恭敬;丈夫不仁义,妻子就不会顺从。
Life is short. Stunt hard.