The pursuit of mathematical truth requires both intuition and rigor.
智者寻求的善，就是智者。
To be a father is to be condemned to watch your child grow up.
切勿对已经敞开心胸的人闭上双唇。
若心不专一就会一无所获，要想求全就学得不精，一心二用就会学不明白。意在强调专心致志和“术业有专攻”的重要性，只有专注于自己的志业，不好高骛远，才能有所成。
What we know is not much. What we do not know is immense.