最可怕的怪物是那些看起来和我们一样的怪物。
The most terrifying monsters are the ones that look just like us.
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
历史的伤痕并非总是可见的，但它们始终存在。
生命的终结是幸福，而幸福是宁静。