肉体是悲伤的，唉，而我已读完所有的书。
The flesh is sad, alas, and I have read all the books.
Every mathematical problem has a solution; it just takes time and creativity to find it.
The most profound ideas in mathematics often come from asking the simplest questions.
知识的最大敌人不是无知，而是对知识的幻觉。
自然是最好的老师，而实验是我们唯一可以信任的解释者。
One way of looking at speech is to say that it is a constant stratagem to cover nakedness.
高效算法的开发既是一门艺术，也是一门科学。