计算复杂性的研究告诉我们，有些问题本质上是困难的，无论我们的算法多么聪明。

倘若一个人对一朵花情有独钟，而那花在浩瀚的星河中，是独一无二的，那么，他只要仰望繁星点点，就心满意足了。

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

计算机非常快、准确且愚蠢。人类非常慢、不准确且聪明。两者的结合是一种无法计算的力量。

As we delve deeper into the quantum world, we find that topology is not just a mathematical curiosity, but a fundamental aspect of nature.

I love the man that can smile in trouble， that can gather strength from distress， and grow brave by reflection.