Combinatorics is like the art of counting without actually counting.
通常,我们只看见我们正在寻找的东西,有时甚至凭空就能看见。
薪柴会烧完,火种却传下去,不会穷尽。
数学是一种创造性的努力,就像艺术或音乐一样。
To create is to confront the chaos of existence and give it form.